5-2 Day Programmable 2 Heat/1 Cool Conventional and Heat Pump Thermostat, Dual Powered:Hardwired;24VAC, Battery;AA(2) Batteries Not Included, Large Display w/Bright Ble Backlight, Adjustable Temperature Set Point Limits, Non-Volitale Memeory Retains User Settings, Filter Check Monitor, Adaptive Recovery Mode(Arm), Adjustable Temperature Differential(S), ESD Guard Electronic Circuitry, Compressor Short Cycle Protection, Separate Heating and Cooling Set Point Program Times and Temperatures, Temporary Program Overrride for 4 Hours or Until Next Set Point, Programmable Extended Hold Mode, Front Access Reset Button, F Degrees/C Degrees Switch, Gas/Electric Fan Switch, Mouont To Horizontal Box, Easy Access Front Battery Door, Separate O & B Terminals, Dims:35/8"H X 45/8"W X 1"D, Weight:4 Oz, In Mfg Box, Made In China.