Honeywell Home Thermostat, Series: Pro 1000, Non-Programmable Thermostat, R, RC, C, W, Y, G, O, B Terminal Designations, Heat/Cool/Off System Switching, Auto/On Fan Switching, 1 Stage, 5 to 90 % Humidity, 1.32 sq-in Display, 20 to 30 VAC, Horizontal Mounting, Premier White®, 4-10/16 in W x 1-3/16 in D x 3-7/16 in H, Import,