Small Dome CCTV Microphone COTT- QD20

  • Pickup Area: 10-80㎡(adjustable)
  • Transmission Distance: 3000M
  • Frequency Response: 20Hz~20kHz
  • Sensitivity: -45dB
  • SNR: 70dB(1m40dB) 50dB(10m40dB) 1KHz at 1Pa
  • Directional Property: Omnidirectional
  • Dynamic Range: 104dB (1KHz at Max dB SPL)
  • Max Sound Pressure: 120dB SPL (1KHz,THD 1%)
  • Output Impedance:600~1000Ω non-equilibrium
  • Output Signal Amplitude: 2.5Vpp/-25db
  • Microphone: Electret condenser microphones
  • Microphone Quantity: 1pcs
  • Signal Processing Directional: Logic dolby surround sound system, AGC, ALC
  • Protective Circuit:Lightning protection, power supply polarity reverse connect protection,ESD protection
  • Connection Way: 3 leading wires(red lead is power positive wire, white lead is audio positive, black is public ground wire)/AV wiring system(DC female, RCA)
  • Transmission Cable: RVVP3×0.5mm2 shield cable
  • Supply Voltage: DC10V~18V (recommend to use 12V, more than 500 meters recommended 15V)
  • Working Current: 50mA
  • Working Environment: -25℃~70℃
  • Color: White
  • Housing Material: Advanced resin PVC
  • Product Size: 72mm×44mm
  • Weight: 40g
  • Place of Origin: Guangzhou,China
  • Supply Ability: Spot Goods
  • Approvals: CE, ROHS, FCC, ISO9001

Product Overview

● QD20 Small dome audio pickup, designed for audio monitoring, the advantages of big monitoring range and high sensitivity.
● Dome appearance, the surface design with four line lattice, better to collect environment sound within 10-80㎡.
● Internal circuit with AGC gain control and power amplification circuit, maximumly eliminate the noise, to guarantee the output intensity.
● Using directional logic dolby surround sound system, effectively reduce the high frequency and low frequency noise of environment and circuit.
● Built-in lightning protection, power supply polarity reverse connect protection, ESD protection and power protection module.
● Long audio signal transmission technology, 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 the banks, factory, schools, interrogation room, prison and any places need to monitoring.
● 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.

Analog Systems
Network Systems

contact us


Guangzhou Sizheng Electronic Technology Co.,Ltd.

We provide customers with quality products and provide high-quality services


If you would like to leave us a comment please go to contact us