White-Rodgers™ Blue™ Thermostat, Digital, Programmable Thermostat, 45 to 99 deg F Control, RC, RH, C, W/E, W2, Y, Y2, O/B, G, L, 6, +, S, -, A1 Terminal Designations, Heat/Cool/Off System Switching, Auto Fan Switching, 4 Stage, 2 Stages Heat, 2 Stages Cool, 7 or 5-1-1 Days Programs per Week, 6 sq-in Lighted Display, 20 to 30 VAC, Battery/Hardwired/Power Saving Battery Assist Power Source, White, 6-1/2 in W x 1-7/8 in D x 4-3/16 in H, Import