VideoSecu High Sensitive Audio Pickup Device External Amplified Microphone Sound Voice Collecting with Bonus Warning Decal WD6 Super high gain mini microphones capturing audio evidence Built in on board IC preamp, low noise, high gain and auto level adjustment Pick up every sound with this super high gain micro audio system Preamplifier used to increase a microphone's low output voltage to a stronger usable level RCA connector, bonus warning sticker is included. This microphone is compatible with devices that accept AV input, like TV, VCR, DVR