Great way to get audio especially to-go, microphone without extra wiring required. Microphone has 3ft approximately power/audio cable attach to microphone. Microphone hear great up to 50ft range as tested by us. The distance of audio will varies on tone of voice. We recommend you stay within a specific range to get clear audio. The closer you're around the mic the louder you can hear. Works great with any portable dvr. Plug power connection to any 12v power adapter or 12v battery adapter and plug audio connection to audio recorder. Power adapter is included.