Brief: B/W Video Door Phone 1) 4" B/W Flat CRT Display 2) Hands-free type 3) One camera to one monitor Product describe: 1) Power supply: DC 18V 2) Power consumption: a) Standby: 0.5W b) Working: 10W 3) Working Temperature:-20 ~ 50'C Resolution:380 TVL 5) Dimensions (W x H x D): 222 x 222 x 65mm 6) Available cameras: TK-808B