VideoSecu High Sensitive Pre-amp Audio Mini Microphone Sound Voice Pickup Kit with Power Supply, Extension Cable and Free Warning Decal W0F Super high sensitive mini microphone capturing audio evidence. This microphone is compatible with devices that accept AV input, like TV, VCR, DVR Monitor range: 60sqf -1600sqf. Current consumption: 20mA RCA for audio output, 2.1mm center DC plug for power input Output level: 0--6V. Frequency range: 300--5 kHz Package included: 1 x microphone, 1 x 12V DC 500mA power supply and 50ft extension cable