Honeywell / Ademco High Security Wireless Receiver - 5881ENH
 
Wireless receiver that allows for expansion of wireless zones on Vista systems. Unlimited zones depending on control panel. 
 
Diversity Reception With Two Antennae.
Remote Mounting For Best Location.
Unique Supervision & Low Battery Indication By Point.
Compatible With All Vista Control Panels.
Compatible With All 5800 Series Wireless Devices.
Operates in High Security Mode For Encrypted Devices.