CCTV Camera Microphone for Audio Capture This audio surveillance microphone can be added to any surveillance system with audio input. The CCTV Camera  mic is typically used as an add on to use with CCTV cameras that do not have built in audio.  can be used with CCTV Camera - surveillance DVR. This microphone is stand alone as it does not reply on the power source from a security camera. Plug and play cables can be used with these microphones to easily run both the audio and power centrally back to the DVR.Operation Voltage: 6-12VDCFrequency Response: 100  -   5500Hz, output signal,Amplitude: 2.5Vpp/-25dBTransmission Distance: Over 1000MBug Range: 80 square meterOne add-on mini audio box for all Camera which need audio functionHigh Sensitive microphone and 12V power regulator built-in boxExtremely SensitiveGreat for Security Monitoring