The Honeywell THM5320R1000 Wireless Interface Module is powered by RedLINK reliability and can be used for up to 3 heat and 2 cool pump systems. This wireless module can be used with the Honeywell TH6320R1004 or TH5320R1002 Wireless FocusPRO Thermostats.
Honeywell THM5320R1000 Equipment Interface Module
$58.53