HONEYWELL HOME YTH6320R1023/U WIRELESS THERMOSTAT KIT BATTERY 2 STAGES HEAT/COOL
Includes wireless FocusPRO thermostat and wireless adapter. This thermostat simplifies installation while contributing to energy efficiency. Ambient Temperature Range : Thermostat at 32°F to 120°F; Wireless Adapter at -40°F to 165°F.