• 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. This microphone is compatible with devices that accept AV input, like TV, VCR, DVR
• Preamplifier used to increase a microphone's low output voltage to a stronger usable level
• Super high gain mini microphones capturing audio evidence
• Package included: 1 x pre-amp microphone, 1 x 12V DC 500mA power supply and 100ft extension cable

Collect audio evidence as important as capturing video evidence, this pre-amp microphone kit is a perfect addition to any video DVR camera system. This microphone is compatible with devices that accept AV input, like TV, VCR, DVR。 This high gain mini pre-amp and microphone is the best for CCTV professionals, with Pre-amplifier IC built on board, it increase a microphone’s low output voltage to a stronger, more usable level, it features low noise, high gain and auto level adjustment on-board pre-amp circuit. This mini-size microphone is only 5 mm in diameter, easily hidden. Notice: This item is VideoSecu brand.