Honeywell Home VISTAKEY Single Door Access Control system is incredibly easy to install and configure. Designed to provide low-cost access control expansion for the popular VISTA-32FB, 128BP, 128FBP, 250BP or 250FBP Integration Ready Control Panels, the state-of-the-art module maximizes security investments by integrating access control, intrusion detection and fire detection into one system. Installation costs are reduced by eliminating the need to install additional wiring, panels and software. VISTAKEY controls and manages employee or customer access to designated or restricted area(s) in any business and communicates with the control panel on a standard two-wire V-Plex polling loop.