Honeywell TH2110D1009 PRO 2000 Basic Thermostat, Premier White, Outside Depth: 1-1/8 IN, Outside Width: 2-7/8 IN, Amperage Rating: Heat And Cool: 0.02 - 1 AMP Running, Outside Height: 4-11/16 IN, Programmable, Setting Temperature: Heat: 40 - 90 DEG F, Cool: 50 - 99 DEG F, 1 Heat/1 Cool, 20 - 30 VAC, 750 MILV, Thermistor Sensor Element, Accuracy: +/-1 DEG F, +/-0.5 DEG C, 50/60 HZ, Switch Type: Relay, Humidity Range: 5 - 90 PCT RH Non-Condensing, Switch Position: Heat-Off-Cool (System), Auto-On (Fan), Terminal Designations: R, C W, Y G, O/B, For Heating/Cooling Or Heat Pump Without Auxiliary Heat