1 Wide application ranges. Suitable for banks, schools, public security organs (5 - 100 adjustable). 2 High sensitivity, low noise, very low power consumption, power supply polarity protection circuit 3 Signal transmission distance is approx. 1000m/1093.6yd. Frequency response is 20Hz - 20kHz. 4 The connection method is 3-wire system. Red is power positive pole, black is public GND, white is audio positive pole. 5 An electro-acoustic instrument that amplifies sound by receiving sound vibrations.Item Type: CCTV MicrophoneMaterial: Aluminium alloyPlace of Use and Area: For banks, schools, public security organs (5 - 100 adjustable)Signal Transmission Distance: Approx. 1000m/1093.6ydFrequency Response: 20Hz - 20KHzDirectional Property: OmnidirectionalConnection Mode: 3 Wire system (Red is connected to power positive pole, black is connected to public GND, white is connected to audio positive pole)Transmission Cable: RVVP3 x 1.5mm

What's in the box
1 x CCTV Microphone1 x English Manual