THM4000R1000
Honeywell THM4000R1000 4-Zone Wireless Adapter
The Honeywell Wireless Adapter allows you to easily add RedLINK™ enabled thermostats to TrueZONE zoning systems and select TrueSTEAM humidifiers (HM506W1005, HM509W1005, HM512W1005) without running new wires.