Non-programmable digital thermostat provides basic and simple operation with specific models for conventional and heat pump systems. Easy-to-read backlit display is legible in various lighting conditions. Precise comfort control [±1F (±0.5C)] maintains consistent comfort with highest level of accuracy. Easy-to-use slide switches allow selection of heat or cool mode, and operation of fan. Application: 2 heat/1 cool, heat pump systems. 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.