Honeywell 1-Week Programmable Thermostat offers precise temperature control with an accuracy of +/- 1 degree Fahrenheit. It features a sleek one-piece design with all control buttons conveniently located on the face of the product, making it easy to operate. The soft-touch buttons and one-touch hold feature ensure effortless programming. This thermostat is designed for vertical positioning, making it an ideal upgrade from standard manual thermostats. It does not work with heat pumps.