1. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Trust System Application Beijing Rui Sen Technology Co., Ltd. Feb/2010

2. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert RStech Products

3. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert HardwareHardware ● Type 1 artificial ear ・ IEC60318 coupler ・ Pressure-field mic and preamplifier ・ 2-Channel conditioning amplifier 200V ・ 2-Channel ICP conditioning amplifier ● Microphone ● Artificial Mouth ・ IEC60711 coupler ・ High-leak, low-leak pinna ・ Pressure-filed microphone and preamplifier ・ Conform to ITU P.51 ・ Fit online test ● Conditioning Amplifier ● Type 3.2 artificial ear ・ 1/2’ free-field microphone ・ 1/2’ pressure-field microphone ● Power amplifier● Measure amplifier

4. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Products Certificate Tip: All the hardware products are certificated by WCCL which is a third party certification lab.

5. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Software introduction –Production/Laboratory PC based test system for electro acoustic transducers –Virtual Instrument System (Lab VIEW-based) –Standard PC, Sound Card, and Windows platform –Open Code –Update conveniently and timely –Easy-to-use for operator –Lower cost for production line –Good compatibility with hardware –Turn-key solution Say Goodbye to dated facility Trust System

6. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Software philosophy Traditional Hardware –based test system TrustSystem software-based test system Tip: TrustSystem provides optimized turnkey solution for any electroacoustic components. We supply solution, proposal, and counseling. evolution

7. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Software: Applications and functions Electroacoustic Devices Loudspeakers Microphones Hearing Aids Headsets Telephones Traditional measurements Frequency Response Linearity Harmonic Distortion Impedance Phase Loudness Electroacoustic Devices Loudspeakers Microphones Hearing Aids Headsets Telephones Traditional measurements Frequency Response Linearity Harmonic Distortion Impedance Phase Loudness

8. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Applications

9. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Speaker and Receiver Measurement Speaker Test Equipment Setup

10. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Speaker and Receiver Measurement Receiver Test Equipment Setup

11. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Speaker and Receiver Measurement Products Order Speaker Test 1000ATrustSystem analyzer PA3000 power amplifier RST1000 1/4 inch free-field microphone PM2000-S ICP microphone conditioner Cable kit Receiver Test 1000ATrustSystem analyzer PA3000 power amplifier AE1000 IEC318 artificial ear PM2000-S ICP microphone conditioner Cable kit

12. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Speaker and Receiver Measurement Test Items Frequency Response THD Phase Impedance Rub&buzz F0 Q Value T-S Parameters Loudness Rating dB Phon dB Sone Polar Plot Impulse Response

13. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Speaker and Receiver Measurement Functions One-click test all parameters Modularization, easy to update and flexible Multi signals : Sweep, Noise, Wave, Multitone Flexible resolution : Log, Linear, user define signals Standards: IEC, IEEE, ITU, ISO, TIA Limits, Data save, Statistics Friendly interface Fast and accurate On-line test : only 1-2 seconds for one DUT Multi-channels test Automation test support

14. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Microphone Measurement Microphone Test Equipment Setup

15. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Microphone Measurement Products Order 1000BTrustSystem analyzer (Including software ， Hardware key and audio card) PA3000 Power Amplifier (Including impedance box) RST40001/2 inch free-field microphone(Including preamplifier) PM2000-Sdual channel ICP microphone conditioner (Including 0 ， 20 and 40dB gain) Cable kit

16. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Microphone Measurement Test Items Frequency Response Phase Sensitivity Current Self Noise Signal to Noise Ratio Directivity Digital microphone test RStech USB data convertor Microphone array test New feature Digital Mic test Flow Chart

17. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Bluetooth headset Measurement Blutooth Headset Test Equipment Setup

18. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Bluetooth Headset Measurement Products Order 1000DTrustSystem analyzer (Including software ， Hardware key and audio card) PA3000 Power Amplifier (Including impedance box) RST40001/2 inch free-field microphone(Including preamplifier) PM2000-SDual channel ICP microphone conditioner (Including 0 ， 20 and 40dB gain) AE4000Type 3.2 artificial ear (Including High leak pinna and low leak pinna) AM1000Artificial Mouth Cable Kit

19. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Bluetooth Headset Measurement Test Items Sending Frequency Response Receiving Frequency Response Talker sidetone frequency response Sending Loudness Rating(SLR) Receiving Loudness Rating(RLR) Talker Sidetone(STMR) Weighted Terminal Coupling Loss(TCLw) Sending Distortion and Noise Receiving Distortion and Noise Sending and Receive idle Noise 20Hz to 20khz frequency coverage A2DP profile support for stereo testing Headset and Hands-free profile support for mono headsets According to 3GPP standard, ANSI/TIA- 810-B and IEEE 269 standard Data import and export Barcode control Easy to setup and modify test limits One-button operation for the whole test Spectrum FFT Analyzer Real Time Analyzer(RTA) Key Features

20. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Earphone Measurement Earphone Test Equipment Setup

21. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Earphone Measurement Products Order 1000CTrustSystem analyzer (Including software ， Hardware key and audio card) PA3000 Power Amplifier (Including impedance box) PM2000-SDual channel ICP microphone conditioner (Including 0 ， 20 and 40dB gain) AE2000IEC711 Artificial Ear AM2000Artificial Mouth Cable Kit

22. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Earphone Measurement Test Items Earphone Frequency Response Impedance Phase and L/R Balance Sensitivity and L/R Balance THD Rub&Buzz Microphone Frequency reponse Microphone sensitivity 20Hz to 20khz frequency coverage Headset and Hands-free profile support for mono headsets USB, Stereo support Data import and export Easy to setup and modify test limits One-button operation for the whole test Spectrum FFT Analyzer Real Time Analyzer(RTA) Key Features

23. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert VOIP Terminal Measurement VOIP Terminal Test Equipment Setup Trustsystem

24. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert VOIP Terminal Measurement Products Order TrustSystem analyzer(Include software, harware key and audio card) PA3000 Power amplifier AE1000 IEC 60318 artificial ear AE4000 Type 3.2 artificial ear(including high leak pinna and low leak pinna) AM2000 Artificial Mouth PM2000-S Dual channel ICP microphone power supply Cable kit

25. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert VOIP Terminal Measurement Test Items Sending Frequency Response Receiving Frequency Response Talker sidetone frequency response Sending Loudness Rating(SLR) Receiving Loudness Rating(RLR) Talker Sidetone(STMR) Weighted Terminal Coupling Loss Sending Distortion and Noise Receiving Distortion and Noise Sending Idle Noise Receiving Idle Noise Sending Latency Receiving Latency

26. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert VOIP Terminal Measurement Key Features and Benefits Assignable security levels One-button operation for running a suite of tests Easy to modify test limits, test param­eters, and sequences Control other programs & devices According to Tia-810, TIA-920, ITU-310 and ITU-311 standards Data import and export Barcode control Open system architecture SIP and H.323 protocols supported Compare results automatically to defined standards or in-house tests Full statistical analysis

27. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Cell Phone Measurement Cell Phone Test Equipment Setup

28. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Cell Phone Measurement Products Order TrustSystem analyzer(Including software, harware key and audio card) PA3000 Power amplifier AE1000 IEC 60318 artificial ear AM2000 Artificial Mouth RST4000½ inch free-field measurement microphone(including preamplifier) PM2000-S Dual channel ICP microphone power supply Cable kit

29. Copyrights Beijing RSTech Co., Ltd. All Rights Reserved Trust System Acoustic Expert Cell Phone Measurement Test Items Sending Frequency Response Receiving Frequency Response Talker sidetone frequency response Sending Loudness Rating(SLR) Receiving Loudness Rating(RLR) Talker Sidetone(STMR) Weighted Terminal Coupling Loss Sending Distortion and Noise Receiving Distortion and Noise Sending Idle Noise Receiving Idle Noise Sending Latency Receiving Latency dB Phon and dB Sone

30. Trust System Acoustic Measurement Expert Trust System Acoustic Expert Solution RSTech is pursuing three programs to make the vision a reality. Consult Quality To supply Turn-key solutions To do joint design with customers To ensure the production quality