1. power supply: DC 12V/ 1A
2. screen: 4" B/W or 3.5" color LED
3. effective resolution: 640*380
4. operation temperature: -20D~ +60D
5. external dimension: monitor: 213*195*45mm     camera: 125*95*35mm
6. installation: surface-mount
7. match way: one to one, one to two, two to one, two to two
8. connection: 5 wires
9. function:
a. visitor calling, video intercom, unlock, monitor
b. manual deterrent alarm, infrared ngith vision,  automatic timer switch
c. audio and video output, can be connected to the image memory