First Alert VISTAHTKVR-V ISTA H3 64 V-Plex -Zone Module

The VISTAHTKVR-V module allows for the addition of VLEX devices onto a mid-level VISTAH Series system reducing the need to pay more for a larger commercial system. VPLEX sensors can be installed using two wires for power and data instead of the traditional four, reducing wiring costs. These devices draw minimal amounts of current minimizing the need for additional auxiliary power supplies.