Using audio signals in CCTV systems allows to increase the whole system effectiveness. The MP-1/R is designed to listen to sound from the surroundings and operate with DVRs. Module was made in SMD technology for further mounting, eg in camera bracket. The device has microphone placed on the cable, and gain control PCB potentiometer. The gain control is useful due to various levels (various sensitivity) of audio recording circuits.
1) Gain adjustment
The device is tiny sizes:
1) microphone2) Output3) ground4) +12V DC - power supply