The Honeywell Non-Programmable Wireless FocusPRO Kit (YTH5320R 1000) contains everything you need to relocate your thermostat or upgrade your equipment without running new wires.
Wireless FocusPRO 5000 (TH5320R 1002):
Equipment Interface Module (EIM):
Return Air Sensor:
Also available is the Wireless FocusPRO 5000 System Kit, which contains the FocusPRO 5000 Thermostat, Equipment Interface Module, Return Air Sensor, Personal Comfort Station™ and Wireless Outdoor Sensor.