Item No.: COTT-QD20S
CCTV Audio Microphone
Description Specification

QD20S 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 10-60 square meters.
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.

Items Performance Metrics
Audio Monitor Range 10-60 square meters (adjustable)
Audio Transmission Distance  3000m
Frequency Response 20Hz~20KHz
Sensitivity -45dB
SNR 70dB(1m40dB)50dB(10m40dB)1KHz
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
Signal Amplitude 2.5Vpp/-25db
Microphone  Electret condenser microphone
Microphone Quantity 1pcs
Signal Processing Circuit Directional logic dolby surround sound system, AGC, ALC
Protective Circuit Lightning protection, power supply polarity reverse connect protection,
ESD protection
Connection Way 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
Housing Material Advanced resin PVC
Color White
Weight 40g
Product Size 72mm*44mm
Approvals CE,ROHS,FCC, ISO9001
Place of Origin Guangzhou, China