VideoSecu Audio External Amplified Microphone High Sensitive Preamp Mini Mic with Power Bypass Sound Voice Collecting and Free Warning Decal M3E Pick up every sound with the super high gain micro audio system. This microphone is compatible with devices that accept AV input, like TV, VCR, DVR Built in on board IC preamp, low noise, high gain and auto level adjustment Connection Type: RCA connector for audio and a power plug of 2.1mm center positive Collect audio evidence as important as capturing video evidence