Honeywell YTL9160AR1000 E-Connect Wireless Programmable/Non-Programmable Line Volt Thermostat Kit

Equipment Interface Module (Eim): All Hvac Equipment Is Wired To The Module. Module Receives Communication From The Wireless Devices Return Air Sensor: Works With The Equipment Interface Module To Maintain Safe Indoor Temperatures If Power Is Lost At The Wireless Thermostat. Maintains 62 F For Heating And 82 F For Cooling Red Link Wireless Technology: Powered By Red Link Reliability.