This CCTV microphone taps into your current cameras power using the red and black cable and then the white cable you use 2 strand cable (if you have used cat5 cable to connect existing you will have 2 spare strands) and the connectors are included for the mic and for the DVR side. Quite simple to add audio to systems where either the camera has no mic or the DVR does not support audio over coax. Please note you will need to strands of cable spare or freshly wire a 2 core cable to get the audio back to the DVR. Any questions let me know.
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