... -hole camera 3: Handfset indoor monitor 4: lowest price Hot B/W video door phone :Model:SMTV1B- ... sensor.6 LED lights,nightvision.**handset indoor monitor, 4 inch CRT,clear image.**intercommunication,monitoring ... can connected with four monitors.(different choice)**four wires,DIY installation**Including in one kit:One indoor monitor, one ... 69(L)×157(W)×23(H)mm **Wiring requirements:30M: RVV4 X 0.5 mm,50M: ...