Basic PRO 2000 programmable thermostat for heat/cool or heat pump without auxiliary heat. Dimensions: 4-11/16 inch high X 2-7/8 inch wide X 1 1/8 inch deep (120mm high x 74mm wide x 28mm deep). Mounting: vertical. Switch positions (system): heat/off/cool. Switch positions (fan): auto-on. Premier White®. Programmability: 5-2 days (weekdays/weekends). Setting temperature range: Heat 40 to 90F; Cool 50 to 99F (Heat 4.5 to 32C; Cool 10 to 37C).