Basic digital nonprogrammable thermostat. heat and cool. Temperature range on heat is 40 to 90 F.; on cool 50 to 99 F. Sleek 1 piece design with all control buttons on the face of the unit. Vertical positioning for easy upgrade from standard manual thermostat. Soft touch buttons. Use with most gas, oil, electric, forced warm air, hot water, and 750 millivolt or steam. Precise temperature control with accuracy of +/ 1 F. Requires (2) "AAA" batteries, not included. Approximate size: 4.7" H. x 2.9" W. x 1.1" D. Premier white.