NATIONAL HI-TECH ENTERPRISE Let’s listen to the world of audio internet.

Let’s listen to the world of audio internet. S-TRACK, Customer-centered, Based on professional techniques and excellent quality. Guided by the principles of \"pragmatism, efficiency, integrity and mutual benefits. Construct an intelligent ecosphere of audios and videos.

Part 1 Part 2 Part 3 Part 4 Company profile Product introduction Solutions Successful cases 02~03 04~38 39~49 50~56

01 Part 1 Company Profile -01-

Let’s listen to the world of audio internet. Shenzhen S-Track S\&T Co., Ltd. is dedicated to the research, development, produc- tion and sales of audio and video products. By advocating DSP-digitalized, IP-based and AI-intelligent audios and videos, S-Track offers professional audio and video design and development services to the customers. As a national hi-tech enterprise, S-Track has been adhering to the philosophy of \"innovation leads the future\". Currently, S-Track has established two research bases in Shenzhen and Changsha, and its research teams have been equipped with years of experience in the research and application of audio processing techniques, video tech- niques and multimedia communication techniques. S-Track implements standard IPD research and development process and CMMI software quality management system, develops professional algorithms and equipment independently, acquires multiple patents and software copyrights, and constructs the processor-cored audio and video integration solutions, providing best choices for teaching, conference, command center and large venues. Its products are well-received in the world, and S-Track has estab- lished close relations with renowned domestic and international manufacturers. Based on its professional techniques and excellent quality, S-Track sincerely serves each customer by following the principles of \"pragmatism, integrity and mutual bene- fits\". In the future, we will develop more business models and cooperate with our cus- tomers in a more in-depth and effective manner while exploring technical innovations and providing audio-visual solutions. -02-

Development History 2017 The digital audio processor with DBOX interface was launched. DPanel wall-mounted interface machine was launched. MSSM mobile speaker was launched. P5 control panel was launched. 2016 Audio processor with telephone module was released. LION digital amplifier processor was launched. ABOX audio box processor was released. 2015 DSP modular solution was launched. Audio processor with Dante module was released. 2014 TIGER digital audio processor was released. 2013 S-TRACK was founded. -03-

02 Part 2 Product Introduction -04-

All Products Processor TIGER Digital audio processor, network audio processor , telephone audio processor S-TRACK, LION Adhering to the principle of \"innovation Digital amplifier processor, network amplifier processor leads the future\" and always upholding ABOX the innovation spirit. Audio box, processor audio box, extended processor Constantly getting rid of the stale and bringing forth the fresh. Interface DACO Enrich the product categories. Machine Network audio processing interface machine Make efforts for more intelligent audio DBOX and video products. Box-type interface machine DPanel Wall-mounted interface machine Loudspeaker TS Ordinary loudspeaker DS Network loudspeaker Power D-type digital amplifier Amplifier DSP amplifier -05-

Server DCORE Audio server with Dante module Microphone DMIC Desktop conference microphone Control panel TIGER P1 TIGER P3 Eight-key audio control panel 5'' touch control panel TIGER P2 TIGER P5 3.5'' touch control panel 5'' touch-screen network control panel Modules Embedded active speaker module Embedded power amplifier module -06-

TIGER Series Digital Audio Processor TIGER 44S TIGER 88S TIGER 1208S TIGER 1212S TIGER 1616S TIGER 44A TIGER 88A TIGER 1208A TIGER 1212A TIGER 1616A TIGER 44N TIGER 88N TIGER 1208N TIGER 1212N TIGER 1616N Product Introduction TIGER series digital audio processor supports up to 16-channel inputs and outputs of audio signals. With USB interface, it also supports USB recording and broadcasting functions, and supports three kinds of control interfaces: RS232, RS485 and GPIO. It is also optionally equipped with algorithms like brand-new Automatice Mixer (AM), Automatic Feedback Cancellation (AFC), Automatic Echo Cancellation (AEC) and Automatic Noise Cancellation (ANC). Application Scenarios Suitable for sound reinforcement in conference rooms, teaching interaction recording and broadcasting, remote court trial, and video conference; by taking advantage of the audio processor, the conference quality can be enhanced via noise and echo cancellation modules. -07-

Product Features Support multiple languages: Simplified Chinese, Built-in acoustic feedback cancel- Rich external control interfaces: RS232, Traditional Chinese, English, and French; lation module; RS485, GPIO and internet access; Embedded webpage shortcut actions; Built-in acoustic echo cancellation Standard USB: Support recording, support Do not require compact disk, with built-in module; audio broadcasting files; Windows system; Built-in acoustic noise cancellation Support Windows and iOS; module; Product Specifications Sampling 48k@24bit Channel isolation 107dB @1k Hz Common mode rejection (CMR) 70dB @80 Hz Phantom power DC48V Maximum input level 18dBu Maximum output level 18dBu Frequency response 20Hz ～ 20K Hz，±1dB Background noise -90dBu System delay THD+N 0.004% @1k，4dBu Operating power supply 3ms Operating temperature AC110V-220V,50Hz/60Hz Digital-to-analog dynamic range (A-weighted) 120dB Chassis dimensions (width x depth x height) 0-40℃ 482x258x45(mm) Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω EIN (A-weighted) -131 dBu -08-

TIGER D Series Network Audio Processor TIGER D44S TIGER D88S TIGER D1208S TIGER D1212S TIGER D1616S TIGER D44A TIGER D88A TIGER D1208A TIGER D1212A TIGER D1616A TIGER D44N TIGER D88N TIGER D1208N TIGER D1212N TIGER D1616N Product Introduction Network audio processor supports up to 16-channel analog inputs and outputs and 16-channel Dante digital inputs and outputs. With built-in Dante network transmission module, it can achieve audio signal transmission of low latency and high fidelity with the support of high-bandwidth network. It is also optionally equipped with the following algorithms: Automatic Feedback Cancellation (AFC), Automatic Echo Cancellation (AEC) and Automatic Noise Cancellation (ANC). Application Scenarios Designed for local long-distance transmission, coordinated with DBOX, DMIC, etc,; achieving long-distance transmission within buildings and communities, suitable for hotels, supermarkets, stadiums, airports, theme parks, and interactions between multiple conference rooms and between multiple classrooms. -09-

Product Features Support multiple languages: Simplified Chinese, Built-in acoustic feedback cancel- Rich external control interfaces: RS232, Traditional Chinese, English, and French; lation module; RS485, GPIO and internet access; Embedded webpage shortcut actions; Built-in acoustic echo cancellation Standard USB: Support recording, support Do not require compact disk, with built-in module; audio broadcasting files; Windows system; Built-in acoustic noise cancellation Support DANTE: can be shaped into Support Windows and iOS; module; large-scale digital network audio system; Product Specifications Sampling 48k@24bit Channel isolation 107dB @1k Hz Common mode rejection (CMR) 70dB @80 Hz Phantom power DC48V Maximum input level 18dBu Maximum output level 18dBu Frequency response 20Hz ～ 20K Hz，±1dB Background noise -90dBu System delay THD+N 0.004% @1k，4dBu Operating power supply 3ms Operating temperature AC110V-220V,50Hz/60Hz Digital-to-analog dynamic range (A-weighted) 120dB Chassis dimensions (width x depth x height) 0-40℃ 482x258x45(mm) Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω EIN (A-weighted) -131 dBu -10-

TIGER T Series Telephone Audio Processor TIGER T44S TIGER T88S TIGER T44N TIGER T88N Product Introduction Telephone-based digital audio processor enables simple and convenient high-quality telephone voice and achieves regular telephone conference. In terms of control operations, the telephone is similar to ordinary telephone, and is easy to operate. Application Scenarios TIGER T is equipped with telephone interface, and supports full duplex voice transmission. It is suitable for various remote telephone conferences. -11-

Product Features Support multiple languages: Simplified Chinese, Built-in acoustic feedback cancel- Rich external control interfaces: RS232, Traditional Chinese, English, and French; lation module; RS485, GPIO and internet access; Embedded webpage shortcut actions; Built-in acoustic echo cancellation Standard USB: Support recording, support Do not require compact disk, with built-in module; audio broadcasting files; Windows system; Built-in acoustic noise cancellation Support PSTN telephone access, and support Support Windows and iOS; module; remote telephone conference; Product Specifications Sampling 48k@24bit Channel isolation 107dB @1k Hz Common mode rejection (CMR) 70dB @80 Hz Phantom power DC48V Maximum input level 18dBu Maximum output level 18dBu Frequency response 20Hz ～ 20K Hz，±1dB Background noise -90dBu System delay THD+N 0.004% @1k，4dBu Operating power supply 3ms Operating temperature AC110V-220V,50Hz/60Hz Digital-to-analog dynamic range (A-weighted) 120dB Chassis dimensions (width x depth x height) 0-40℃ 482x258x45(mm) Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω EIN (A-weighted) -131 dBu -12-

LION Series Digital Amplifier Processor LION 44S LION 88S LION 1212S LION 1616S LION 44A LION 88A LION 1212A LION 1616A LION 44N LION 88N LION 1212N LION 1616N Product Introduction Digital amplifier processor integrates two-channel 145W digital amplifier modules. The signal processing and power amplification are achieved on the same motherboard, which shortens the signal channel and simplifies the engineering wiring. The processor supports RS232 control interface with power supply. Application Scenarios Suitable for conference rooms, classrooms, training rooms, local amplification, video conference; Lion series processors are equipped with built-in amplifiers, which help to simplify and build audio systems within a limited space. -13-

Product Features Support multiple languages: Simplified Chinese, Built-in amplifier; Rich external control interfaces: RS232, Traditional Chinese, English, and French; Built-in acoustic feedback cancel- RS485, GPIO and internet access; Embedded webpage shortcut actions; lation module; Standard USB: Support recording, support Do not require compact disk, with built-in Built-in acoustic echo cancellation audio broadcasting files; Windows system; module; Support Windows and iOS; Built-in acoustic noise cancellation module; Product Specifications Sampling 48k@24bit Channel isolation 107dB @1k Hz Common mode rejection (CMR) 70dB @80 Hz Phantom power DC48V Maximum input level 18dBu Maximum output level 18dBu Frequency response 20Hz ～ 20K Hz，±1dB Background noise -90dBu Amplifier power 2x150W THD+N 0.004% @1k，4dBu System delay Operating power supply 3ms Digital-to-analog dynamic range (A-weighted) 120dB Operating temperature AC110V-220V,50Hz/60Hz 0-40℃ Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω EIN (A-weighted) -131 dBu -14-

LION V Series Digital Amplifier Processor LION V44S LION V88S LION V1212S LION V1616S LION V44A LION V88A LION V1212A LION V1616A LION V44N LION V88N LION V1212N LION V1616N Product Introduction Digital amplifier processor integrates two-channel 145W digital amplifier modules. The signal processing and power amplification are achieved on the same motherboard, which shortens the signal channel and simplifies the engineering wiring. The processor supports RS232 control interface with power supply. Application Scenarios Suitable for conference rooms, classrooms, training rooms, local amplification and interactive teaching; Lion V series processors are equipped with built-in wireless microphone and amplifier and simplified audio systems, which help to improve the system's stability and rapidly build audio systems within a limited space. -15-

Product Features Support multiple languages: Simplified Chinese, Built-in amplifier; Rich external control interfaces: RS232, Traditional Chinese, English, and French; Built-in acoustic feedback cancel- RS485, GPIO and internet access; Embedded webpage shortcut actions; lation module; Standard USB: Support recording, support Do not require compact disk, with built-in Built-in acoustic echo cancellation audio broadcasting files; Windows system; module; Built-in wireless microphone; Support Windows and iOS; Built-in acoustic noise cancellation module; Product Specifications Sampling 48k@24bit Channel isolation 107dB @1k Hz Common mode rejection (CMR) 70dB @80 Hz Phantom power DC48V Maximum input level 18dBu Maximum output level 18dBu Frequency response 20Hz ～ 20K Hz，±1dB Background noise -90dBu Amplifier power 2x150W THD+N 0.004% @1k，4dBu System delay Operating power supply 3ms Digital-to-analog dynamic range (A-weighted) 120dB Operating temperature AC110V-220V,50Hz/60Hz 0-40℃ Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω EIN (A-weighted) -131 dBu -16-

Sever Series Network Audio Server DCORE 6464 Product Introduction DCORE series network audio servers are DSP processing equipment developed for Dante. They only have digital signal processing for Dante, but no analog signal processing. By accessing them to Dante network, the network transmission and processing of audio signals can be achieved. DCORE series network audio servers support up to 64x64 and adopts modular configuration, achieving more efficient signal processing. They also support Automatic Feedback Cancellation (AFC), Automatic Echo Can- cellation (AEC) and Automatic Noise Cancellation l (ANC). They also support 64-channel inputs and outputs of matrix mixing and 16-channel full-featured signal processing. Application Scenarios Suitable for conference centers, hotels, stadiums; form a large-scale network audio system with the support of Dante microphone, Dante interface machine, Dante amplifier and Dante speaker. -17-

Product Features Fully-networked system input Built-in acoustic feedback cancel- Rich external control interfaces: RS232, and output; lation module; RS485, GPIO and internet access; Strong processing capacity; Built-in acoustic echo cancellation Standard USB: Support recording, Support up to 64x64 channels; module; support audio broadcasting files; Built-in acoustic noise cancellation Support DANTE: Can be shaped into module; large-scale digital network audio system; Product Specifications 64 64 Number of digital input channels for DANTE audio Number of digital output channels for DANTE audio 3ms System delay AC110V-220V,50Hz/60Hz Operating power supply 0-40℃ Operating temperature 482x258x45(mm) Chassis dimensions (width x depth x height) -18-

Interface Machine Series Digital Audio Processor DBOX44-I DBOX44-L DBOX44-H Product Introduction Network audio interface machine achieves conversions between digital network signals and analog signals. 4x4 is an ideal choice for digital upgrade of analog multimedia system. Application Scenarios Suitable for large conference rooms, multi-functional halls, theaters and conference centers; support expanded processor input and remote signal access, and reduce the burden of audio processor in the computer room through distributed processing. -19-

Product Features Support multiple languages; Built-in acoustic feedback cancel- Built-in DANTE; Embedded webpage shortcut actions; lation module; Built-in network adapter; Built-in acoustic echo cancellation module; -131 dBu Built-in acoustic noise cancellation 18dBu module; 18dBu -90dBu Product Specifications 3ms Sampling 48k@24bit EIN (A-weighted) PoE或DC 12V Maximum input level 0-40℃ Phantom power DC48V Maximum output level Background noise Frequency response 20Hz ～ 20K Hz,0dB System delay Operating power supply THD+N 0.004% @1k，4dBu Operating temperature Digital-to-analog dynamic range (A-weighted) 120dB Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω -20-

Interface Machine Series Network Audio Interface Machine DACO 88 DACO 1616 Product Introduction Network audio interface machine achieves conversions between digital network signals and analog signals, and supports up to 16-channel analog inputs and 16-channel analog outputs. It is an ideal choice for digital upgrade of analog multimedia system. Application Scenarios Suitable for large conference rooms, multi-functional halls and theaters; support expanded processor input and remote signal access. -21-

Product Features Support multiple languages; Multiple optional specifications; Built-in DANTE; Embedded webpage shortcut actions; Support MIC/Line; Built-in network adapter; 48V phantom power; System status indicator light; Support up to 16x16 channels; Product Specifications Sampling 48k@24bit Channel isolation 107dB @1k Hz Common mode rejection (CMR) 70dB @80 Hz Phantom power DC48V Maximum input level 18dBu Maximum output level 18dBu Frequency response 20Hz ～ 20K Hz，0dB Background noise -90dBu System delay THD+N 0.004% @1k，4dBu Operating power supply 3ms Operating temperature AC110V-220V,50Hz/60Hz Digital-to-analog dynamic range (A-weighted) 120dB Chassis dimensions (width x depth x height) 0-40℃ 482x258x45(mm) Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω EIN (A-weighted) -131 dBu -22-

Interface Machine Series Wall-mounted Interface Machine DPanel-M22 Product Introduction DPanel series wall-mounted interface machines boast analog input and Dante digital input, analog line output and Dante digital output. The analog inputs support phantom power and manual preamp-gain adjustment. Application Scenarios Suitable for conference rooms and multi-functional halls; hidden input and output interfaces are reserved. -23-

Product Features Support DANTE network transmission, remote Input interface XLR and TRS reusable; 0-20db amplification; transmission, and the wiring is very simple; Support analog balanced line output; Piano lacquered panel; Installed on wall and desktop; Support 48V phantom power; Plug and play; Support balanced or unbalanced line and mic input; Product Specifications Sampling 48k@24bit Channel isolation 100dB @1k Hz Phantom power DC48V Common mode rejection (CMR) 80dB @80 Hz Frequency response 20Hz ～ 20K Hz，±0.7 Maximum input level 8dBu THD+N Maximum output level 12dBu Digital-to-analog dynamic range (A-weighted) 0.005% @1k，4dBu Background noise -93dBu Analog-to-digital dynamic range (A-weighted) 105dB System delay Input impedance (balance-type) 105dB Operating power supply 3ms Output impedance (balance-type) 20kΩ Operating temperature PoE供电 EIN (A-weighted) 100Ω 0-40℃ -126 dBu -24-

Processor Series Audio Box Processor ABOX 44S ABOX 44Z ABOX 44B ABOX 66H ABOX 66A ABOX 66C ABOX66N ABOX 44 Series ABOX 66 Series Product Introduction ABOX series audio box processors are equipped with built-in modular DSP chips, plug and play functions, and do not require software configurations. Although they are small in size, they still own complete functional modules and algorithms. They are easy to install and operate, and can easily satisfy the high-quality voice needs for local recording and broadcasting and remote interactive education. Application Scenarios Suitable for local amplification and video conference in local conference rooms; support feedback cancellation, noise cancellation and echo cancellation through audio processor to enhance conference quality. -25-

Product Features Plug and play; Built-in acoustic feedback cancel- Support balanced or unbalanced Small size, light weight, easy to install, support lation module; line/mic signal; rapid system deployment; Built-in acoustic echo cancellation 48V phantom power; Contain rich digital and analog interfaces, can module; High-speed floating point DSP; be embedded in other products; Built-in acoustic noise cancellation module; -90dBu -11.5dBu Product Specifications 12dBu -90dBu Sampling 48k@24bit EIN (A-weighted) Maximum input level 3ms Phantom power DC48V Maximum output level DC 12V Background noise 0-40℃ Frequency response 20Hz ～ 20K Hz，-6dB System delay Operating power supply THD+N 0.004% @1k，4dBu Operating temperature Digital-to-analog dynamic range (A-weighted) 120dB Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω -26-

Processor Series Audio Box Processor ABOX 1004S ABOX 1004A ABOX 1004N Product Introduction ABOX 1004(s/a/n) owns 10-in-4-out balanced signal interfaces. Its parameters and performances are slightly adjusted, and control internet accesses are added. With optional wifi transmitting antenna, the users may connect to the client software through wired or wireless way to self-define the functional modules and choose AFC, AEC and ANC algorithms. Application Scenarios Suitable for education, recording, interaction and video conference; under noisy environment, quality of the conference can be enhanced via noise cancellation and echo cancellation functions of the audio processors. -27-

Product Features Plug and play; Built-in acoustic feedback cancel- Support balanced or unbalanced line/mic signal; 48V phantom power; lation module; High-speed floating point DSP; Small size, light weight, easy to install, support Built-in acoustic echo cancellation Built-in Wi-Fi, allowing the user's on-line opera- rapid system deployment; module; tion via Wi-Fi; Support multiple languages: Simplified Chinese, Built-in acoustic noise cancellation Contain rich digital and analog interfaces, can be Traditional Chinese, English and French; module; embedded in other products; Product Specifications Sampling 48k@24bit EIN (A-weighted) -131 dBu Maximum input level 18dBu Phantom power DC48V Maximum output level 18dBu Background noise -90dBu Frequency response 20Hz ～ 20K Hz System delay Operating power supply 3ms THD+N 0.002% @1k，4dBu Operating temperature DC 12V 0-40℃ Digital-to-analog dynamic range (A-weighted) 120dB Analog-to-digital dynamic range (A-weighted) 120dB Input impedance (balance-type) 20kΩ Output impedance (balance-type) 100Ω -28-

Speaker Series Ceiling Speaker C6 C8 DC6 DC8 Product Introduction Ceiling speaker is generally installed on ceiling, and used in the background music system; its advantage lies in that the speaker can be well-hidden after the system is installed. Product Features 80-20KHz； Get installed through front screws; Dante; PoE power supply; Coaxial point-source output,avoiding the interference of high pitch and bass, and creating more natural sound; -29-

Speaker Series Network PoE Speaker DS6 DS8 Product Introduction Dante network speaker supports network switch power supply via PoE and does not require additional power access. It also achieves the integration of audio data, control signals and power supply. Product Features Dante; 8'' frequency division operating mode; PoE power supply; Several suspension points; Avoid the interference of high pitch and bass; -30-

Array Microphone AM 100 Product Introduction AM100 array microphone adopts beam-forming algorithm to localize sound sources for accurate acquisition. It also supports remote audition system and avoids the ineffective noise in the audio system. Product Features Beam-forming algorithm; 6+1 annular far-field microphone array; 360° sound acquisition; Sound localization; Full digital signals: no digital-to-analog and Voice reinforcement; analog-to-digital conversions are required for transmission and algorithm; -31-

Desktop conference microphone DMIC Product Introduction DMIC is a network microphone with built-in Dante and PoE modules. It can be directly accessed to Dante network, providing a low-latency, high-fidelity and low-cost solution for point-to-point audio connection. Product Features PoE power supply; Four-gear gain adjustment； Dante transmission; Touch microphone switch; -32-

TIGER P5 Product Introduction P5 panel is a wall-embedded control panel developed by S-Track. Its touch operations and network control are enabled through audio processors. Besides, it is beautiful, fashionable and elegant in appearance. Product Features Rapid scenario switching, easy to use; Get installed on desktop/wall; PoE or 12V adapter for power supply and hot backup; One-to-many, switching to manage several Network control processor, without distance limitation; processors; Capacitive touch screen operations; User permission management; -33-

Active speaker module Embedded active speaker Dante module module motherboard MODEL：BTID-22 BTID-44 MODEL：BXTA-D120 BXTA-H120 Embedded active speaker module MODEL：SXTA-D120 SXTA-H120 Embedded active speaker module motherboard DSP/Dante alternative composite design; Single-channel output power: THD=1%, 120W@8Ω; 110V-240V universal power supply; Input: Canon analog input, superposition mode for input; Output: Canon analog output, parallel output of equivalent analog signal; Control: Total volume control of analog potentiometer; RS485/RS232 serial port control; -34-

Amplifier Series Class D Digital Amplifier Dante pinboard Dante module MODEL：MTIA-22 MTIA-44 MODEL：BTID-22 BTID-44 Class D Digital Amplifier Dante pinboard MODEL：A2300 A4300 A2600 A4600 Dante digital signal-to-analog signal; A2300D A4300D A2600D A4600D Analog/digital conversion; Support Dante cascade; Class D Digital Amplifier Built-in DANTE transmission module; Equipped with switching power supply with power factor correction (PFC); Support wide voltage (100-260V, 50-60Hz); Adopt CLASS-D technique, with very high conversion efficiency; Overheating protection; Over-voltage protection; Over-current protection; Under-voltage protection; -35-

Amplifier series DSP amplifier DSP amplifier Embedded amplifier Display and touch- module panel control module MODEL：P2300 P4300 P2600 P4600 P2300D P4300D P2600D P4600D MODEL：MAIA-L4 MODEL：MAIT-4 DSP processing module MODEL：BD-L4 Embedded amplifier module panel Embedded amplifier module motherboard Embedded DANTE transmission; 4-in-4-out with matrix routes, crossover and 8-band PEQ; Equipped with switching power supply with power factor correction (PFC); ADI high-performance DSP chip; Support wide voltage (100-260V, 50-60Hz); Built-in 4'' TFT resistive touch screen; Adopt CLASS-D technique, with very high conversion efficiency; 4 output channels with time delay function, with a range of 0-180ms; Overheating protection; Input and output channels with gain adjustment, mute and level indication functions; Over-voltage protection; Output with amplitude limiter and anti-phase; Over-current protection; Support USB and RS485 control interface; Under-voltage protection; -36-

Software Interface The client control software for the processor adopts the required commissioning tools. The audio commissioning in the engineering practice has been very complicated, so we strive to simplify the problems and schematize the software. Thus, it is easy to operate. The client software supports three mainstream platforms (WINDOW, IOS and ANDROID), and supports the control through browser (fully compatible with IE, CHROME, FIREFOX etc.). iPhone client iPad client Android platform Microsoft platform ISO platform Android client -37-

Windows Software Interface The control software is the best tool for you to monitor and operate digital audio processor. The editing, commissioning and save of various scenarios are achieved based on different functions. The software has many built-in functions, and is easy to operate, bringing the user good experience. It is a value control tool for the users. Windows client is built in the processor -38-

03Prat 3 Solutions -39-

Conference System A conference room is an important venue for governments, enterprises and public institutions to organize discussions and make decisions. It often requires clear voice reduc- tion, easily expandable system, easily-maintained system and strong compatibility. Conference System Sound source A number of Dante microphones Digital conference system Analog microphone TIGER D audio processor DBOX-I interface machine Forced firefighting P5 Dante speaker Network cable source cut PC Audio cable -40-

Remote Telephone Conference System Remote telephone conference system is mainly designed for governments, securities institutions and other units with numerous branches and employees. These large-scale institutions have regular needs for daily communication, collaboration, training, conference and unified dispatching, but the traditional communication and collaboration mode consumes a large number of manpower, resources and time, so the speed and efficiency of communication are also reduced, especially when there is a PR crisis. At the time, remote telephone conference system can be used to improve the conference efficiency and smoothly convene the conference. Remote conference room Telephone set A number of gooseneck microphones Mobile phone Communication operation Telephone audio processor Fixed-line telephone Amplifier Speaker Network cable Speaker cable Telephone line Audio cable -41-

Remote Video Conference System The remote video conference system plays a very good role in the remote collaboration, business trips and message passing. The system is widely applied in the conference, teach- ing, training, commanding, design, enquiry and control fields. The image and sound signals are converted into digital signals at the transmitting end and then reverted to visual and acoustic information at the receiving end. Compared to telephone conference, it is more intuitive and conveys more information. Through the conference TV system, the participants can not only hear the sound and see the other participants, but can also discuss questions and study drawings and objects as they have done in real conferences. Remote Video Conference System Office A number of gooseneck microphones Headquarters Digital audio processor Video conference terminal Ceiling speaker A number of gooseneck microphones Ethernet Amplifier Digital audio processor Speaker A number of gooseneck microphones Branch Speaker Video conference terminal Digital audio processor Amplifier Speaker cable Video conference terminal Speaker Audio cable -42-

Classroom Amplification System 2 hanging microphones can be installed above the platform to pick up the teacher's sound. The speaker is installed on both sides of the blackboard for onsite sound amplification. The sound processing is done by ABOX 1004N, ensuring that the teacher's sound is conveyed to each student clearly and brightly without being intervened. Features: Get rid of handheld microphone, and give better play to the charm of body language; automatic gain, automatic adjustment of microphone volume, avoiding unstable sound; support feedback cancellation, and adopt self-adaptive feedback cancellation algorithm to cancel sound feedback without affecting the sound quality; support noise cancellation, and adopt unique post-processing algorithm to cancel the environmental noise in a rapid and accurate manner. Classroom Electronic whiteboard Blackboard-writing Hanging Hanging Lesson-preparing microphone1 microphone2 Computer Speaker Speaker Hanging Hanging microphone microphone ABOX1004N Amplifier Speaker Speaker Audio cable Speaker cable -43-

Recording teaching system The automatic recording room is configured with 5 high-definition video camera which is mainly used for shooting teachers close up , panoramic lens , students close up , blackboard writing’s and panoramic camera lens. Features: recording, tracking , interactive integration; high performance, highly integrated system, installation is simple; standalone, ability to complete the generally all universities tracking , recording, broadcast, on-demand, interactive with a single equipment . Fully support cloud management with simple operating maintenance. Recording teaching system Electronic whiteboard Blackboard-writing Student close-up Student panorama Hanging Hanging Hanging Hanging Lesson-preparing microphone1 microphone2 microphone3 microphone4 Computer Speaker Speaker Hanging Hanging Classroom Teacher Teacher Student Student microphone microphone panorama close-up panorama panorama close-up Multimedia Webcasting host central control Hanging Hanging ABOX1004N microphone microphone Amplifier AIO teaching machine PoE switch Live \& on-demand \& control Interactive host Audio amplification Cloud platform Speaker Speaker Network cable Audio cable Interactive classroom Speaker cable Video cable Blackboard writing close-up Teacher close-up Teacher panorama -44-

Public Security Bureau, Procuratorate and Court System The construction of digital court will help to improve the trial efficiency, enhance the judicial image and achieve live and on-demand broadcasting and recording of court trial informa- tion, thereby building a \"sunny\" justice. 5 high-definition gun cameras are installed on the court to offer close-ups to the public prosecutor, the defender, the criminal suspect and the witness; pan-shot is achieved at the public gallery. Besides, a high-definition PTZ camera is installed for full view of judgment seat. Benefiting from the visual tracking function of the audio processor TIGER 1616A, the close-ups for judges, jurors and people's jurors are achieved. Each seat is equipped with gooseneck microphone: 5 for judgment seat, 1 for court clerk, 2 for public prosecutor, 2 for defender, 1 for witness stand, and 2 for defendant seat. Through the use of audio processor and court trail host, the main video screen can be automatically switched to the spokesperson. Public Security Bureau, Procuratorate and Court System Defender/Public Public Dock Public 5 microphones 2 microphones 2 microphones 2 microphones Prosecutor PC gallery Witness prosecutionDefense Judgment seat for judgment seat for defender for defendant for public prosecutor 1 microphone for witness stand Multi-functional AIO trail machine 1 microphone for court clerk seat Exhibition platform Digital audio processor Amplifier Speaker Speaker Control cable Audio cable Speaker cable Video cable -45-

Device placement drawings Defender seat Public prose- Witness cutor camera camera Device cabinet J C D u o e d u f g r e m t n e d n c Defendant camera a Judgment t l n seat camera s e Judgment seat camera t e r s a k e t a s t Panoramic camera e for public gallery a Witness stand t Public prosecutor seat Defender camera -46-

Sports System The sports field is vast in area and has many signal sources and long audio transmission distances. Based on these features, Dante transmission protocol is adopted for long-dis- tance transmission, system expansion and redundancy backup. 2 of TIGER D1616S processors are adopted to support hot backup (one master and one backup) to ensure that the program is on the safe side. The audio signals of stadium stand, rebroadcasting room and computer room are transmitted without any loss on a long-distance manner through DACO 88 and DACO 1616Dante. Sports System A number of gooseneck microphones A number of microphones Rebroadcasting room Stand DACO 88 Multimedia message box Speaker Mixing console Backup TIGER D1616S DACO 1616 Power amplifier group PoE switch PoE switch Network cable Speaker cable Computer Room 1 Computer Room 2 Audio cable -47-