Honeywell Thermostat, T6 PRO Series, 20 to 30 V, 0.02 to 1/ 0.02 to 0.05 A, Programmability: 5-1-1 days Programmable, 5-2 days Programmable, 7 days Programmable, Changeover: Auto, Manual, Battery, Hardwired Power Source, Up to 2 Heat/2 Cool Conventional, Up to 3 Heat/2 Cool Heat Pump Stages, Switch Position: Heat-Off-Cool-Auto-Emergency Heat (System), Auto-On-Circ-Follow Schedule (Fan), Relay Switch, Large, Soft Key Control with LED Backlight Display, +/-1 deg F Differential, 40 to 90 deg F Heat, 50 to 99 deg F Cool Settings, 37 to 102 deg F Operating, 32 to 120 deg F Ambient, 5 to 90% Non-Condensing Humidity, 3 deg F Accuracy, UWP System Mounting, Terminal Designation: C, E, G, K, L/A, O/B, R, RC, S, S, W, W2 (AUX), Y, Y2, Fan Current: 0.02 to 0.05 A, Heat Current: 0.02 to 1 A, Dimensions: 4-1/16 in L x 4-1/16 in W x 1-3/32 in D