Welcome to the official website of Guangzhou Sizheng Technology Co., Ltd.!

Characteristic
● COTT-QD35 Advanced professional environmental sound digital monitoring probe, pinhole type design, hidden installation.
● The advanced resin material "honeycomb" collect sound design, completely eliminate "hiss" electronic noise.
● Panasonic omnidirectional condenser microphone，5～50㎡ in high fidelity, high sensitivity, high bandwidth and low noise.
● Use the 0.8mm pinhole type of "the temple of heaven echo wall" principle design , after precise calculation, the reflection angle of sound reach the best.
● Built-in digital speech processing circuit and microprocessor chips, two-stage dynamic digital noise reduction processing, excellent resistance to environmental noise.
● Built-in AGC noise reduction signal processing circuit, advanced echo cancellation technology, effectively reduce the echo of empty room.
● Built-in ALC level control circuit, automatically control high intensity sound, reliably protect back-end audio monitoring equipment
● Integrated professional front audio amplifier circuit, direct drive active speakers, DVR, earphones, etc.
● Applicable to interrogation room, courts,public security organs, procuratorate，banks and other any places need to monitor, give full play to the effect of high-fidelity sound pickup.
● Gain patent certificate of State Intellectual Property Office of The People's Republic of China.
● Gain computer software copyright of National Copyright Administration of The People's Republic of China.

Wiring Instructions