Brief: Video door phone,colored,5.6" screen,handfree,intercom for villa Color Video Door Phone 1) 4 wire system 2) Handsfree 3) 1 camera to 1 monitor, or 1 camera to 2 monitors available Product describe: TK-861C+819C 5.6-inch TFT LCD screen Pinhole aluminum-alloy camera Available with four-wire system Available camera: TK-819C Door lock control Hand-move alarm function Mount type: wall mounted Power supply: 18V DC Dimensions: (W) 230 x (H) 185 x (D) 38mm