ALV-712W 7" Color Video Door Phone with 2-wire installation and 2 way audio.Available June 1, 09The CoviSec ALV-712W is a 2-Wire Color Video Door Phone Intercom System with one of the easiest installation platforms. It features night vision and 2 way audio so you never have to open your door without knowing who is there. The sleek and elegant 7" LCD monitor is a welcome addition to office or home decor. The ALV-712W allows two additional monitors (ALV-712WM) to be connected thus allowing you to view your door from more than location.
