Video door phones(door phone,intercom system)

4 inch handset color video door phones: Specifications: 1) Dimensions (W x H x D): 186 x 222 x 55mm 2 )Four-wire system 3) Power supply: 13.5 V DC / AC 110V 240V 4) Material of outdoor unit: Hard ABS 5) With powersupply built-incolor videophone Features: 1) 4" TFT LCDor B/W CRT high-resolution display color video phone 2) Low power consumption. 3) Intercommunication 4) Electric-controlled unlocking 5) With muilti-function:call in,call out,intercom,monitor 6) LED lumination compensation 7) Water-proof, damage-proof, burgla-proof outdoor unit 8) Unique anti-theft design 9). Brightness, volume and chroma are adjustable. 10). One camera can be connected to up to four monitors, to satisfy you to know the visitor from the living room, bedroom and kitchen etc. 11). It can also support two outdoor cameras to make the visitor can call you from front door or back door. 12).Installation method: Surface Mounting 13).Power consution: Standby:05W; Operation:13W