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

Characteristic
● COTT-QD40 original sound audio monitor specially designed for public security organs and procuratorate  industry of synchronous monitoring recording.
● Using UniGuard RFI shielding technology, prevent radio frequency interference, control noise of surrounding environment.
● 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.
● Using echo cancel concave cavity,effectively reduce serious echo of empty room, provide clear and high quality audio signal output.
● Using directional logic dolby surround sound system，built-in high-speed voice processing units, two level dynamic noise reduction processing.
● SiZhenG large gilded vibration membrane microphone，10～150㎡in high fidelity, high sensitivity, and low noise.
● Built-in AGC and DTS noise reduction signal processing circuit, automatically adjust high strength sound and instantaneous impact sound
● Built-in newest DNP and DSP digital processing unit, completely eliminate "hiss" electronic noise.
● Built-in lightning protection, power supply polarity reverse connect protection, ESD protection and power protection module.
● Long audio signal transmission technology,use the RVVP3 x 0.5mm2 shield cable, it is distortionless within 3km.
● Integrated professional front audio amplifier circuit, direct drive active speakers, DVR, earphones, etc.
● Applicable to banks, schools, meeting rooms, prison other environment of synchronous audio monitoring recording.
● 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