1. Imported high-fidelity and low noise processing chips and a dedicated microphone, built-in automatic gain control circuit, voice clear and pure, less noise.

2. ClearSpeech Adaptive dynamic noise reduction technology, built-in high-speed DSP digital signal processor

3. Using a unique" dynamic closed-loop electronic noise suppression circuitry," and completely eliminate the" hissing" electronic noise.

4. monitor head uses a unique cavity design, can effectively eliminate echo and howling outside.

5. Using 3 core 0.5mm2 RVVP shielded cable 3 km without distortion.

6. The built-in lightning protection, reverse polarity power protection.

7. Integrated import pre audio amplifier, monitor head direct-drive active speakers, DVR.

8. AGC automatic gain circuit amplitude of the output amplitude of the sound more balanced, sound playback smoother and comfortable. CE compliance with EU standards, the US FCC, ROHS environmental certification system.

9. Applicable used in banking, telecommunications, environmental charges lobby counter. Listening range 10-100 square meters.

1. listening area: 10-100 square meters

2. Signal transmission distance: up to 3000 m

3. Sensitivity: -40dB

4. Frequency Response: 20Hz ~ 20kHz

5. Point characteristics: omni-directional

6. SNR: 60dB

7. withstand the maximum sound pressure: 120dB SPL (1KHz, THD 1%)

8. Output Impedance: 600 ohm unbalanced

9. The output signal amplitude: 2.5Vpp / -25db

10: Number of Microphones :: single microphone

11. ClearSpeech DNR DSP, AGC Automatic Gain sound

12. Application: banking, telecommunications, counters and other charges lobby

13. The circuit protection: lightning protection, reverse polarity power protection

14. Connection: DC 12V red positive, black line for the public, the white line audio positive.

15. Transfer Cable: 3 core 0.5mm2 RVVP shielded cable, the more common 4-wire phone cord, Category 5 twisted-pair network

16. Power supply voltage: DC 12V DC

17. Supply Current: 20 mA

18. Working temperature: -30  ~ 60 

19. Color: White, other colors can be customized

20. Shell material: PVC

21. Dimensions: 77mm × 42mm

22. Weight: 66 g

23. Origin: Shenzhen

24. Availability: In Stock.

25. In line with EU standards CE standards, the US FCC certification, environmental ROHs system, Zuigao Jian synchronized audio and video recording system construction specifications