Spec Sheet Preview: The Alpha Communications® VK237WS 2-Wire Color Video Intercom Kit is our most economical master/remote video intercom for door entry or any other application requiring a single master and a single remote intercom station, with expand-ability for a 2nd outdoor remote camera station and up to 3 indoor (7") monitors. These attractive monitors are conveniently surface mounted right on the wall, using a provided wall mounting bracket. A small power supply connects to standard 120VAC/60Hz. electrical power, and provides power for the electronic chime, video monitor/camera and in …