Door Bell with Camera wholesale china

Features:
Digital keypad \Color or Colorless; LCD Screen
Big LCD
Access control for option
Waterproof
Surface mounted
Steeliness material
2 Km control distance
Audio Transmission is Single wire, full-duplex speech circuit Net direct call, 9999 users
Technical parameters:
Camera: 1/3-inch CCD/CMOS
Lens: F = 2 (9 manual zoom, 90 degrees of viewing angle)
Resolution: 420TV lines
Video output 7552905 1Vp-p
Minimum illumination 1.0 lux
Ambient temperature -10~50
Power: 18V (supplied by the indoor phone)
Wire: 6 wires