Honeywell THM4000R1000 Wireless Adapter

Please note this item can only be used with a TrueZone panel. Wireless Adapter allows you to easily add RedLINK enabled thermostats to a TrueZONE system without running new wires. Powered by RedLINK reliability. No interference with other wireless devices in the home. Communicates with Wireless Outdoor Sensor to automatically control humidity to proper levels.