This compact, stylish Honeywell thermostat comes loaded with advanced programming features and a large backlit LED. It controls floor temperature directly using included floor temperature sensor for maximum comfort and efficiency. The programmabilty is outstanding and facilitates energy efficient operation, and is simple to use. GFCI (ground fault circuit interrupt) is built-in for your safety and for building code requirements. Early Start function ensures programmed temperature is reached by programmed time .Temporary bypass enables temperature override without changing programming. ON OFF switch enables thermostat shutdown at the end of heating season for added security. Rated for up to 1800W of floor heating with 120V heating mats, or 3600W with 240V mats. The Honeywell brand assures quality and comes with a 3 year warranty.