1: Cheap B/W video door phone 2: luxury cast iron camera 3: handfree indoor monitor 4: lowest price Hot 4inch B/W video door phone :Model:SMTV3B- ... sensor.6 LED lights,nightvision.**handfree indoor monitor, 4 inch CRT,clear image.**intercommunication,monitoring the outdoor, ... different choice)**four wires,DIY installation**Including in one kit:One indoor monitor, one outdoor camera, power adapter, ...