The LineVoltPRO programmable thermostat provides electronic control of 208/240 Vac resistive rated electric baseboard heaters, radiant ceiling heat, radiant floor heat, convectors and fan forced heaters. 7 day programmable - maintain the pre-set program schedule for up to 20% energy savings, or modify the schedule to fit your lifestyle. Electronic temperature control - precision of +/-1 F saves up to an additional 10% on heating bills. Large, clear, backlit display - easy to read in various lighting conditions. Soundproofed for quiet operation - reduces the clicking noise commonly heard with conventional thermostats. On/Off switch allows you to turn the thermostat off at the end of the heating season. Early start - ensures programmed temperature is reached by programmed time. Maintenance free - no batteries required. 5-year limited warranty. 7 day programmable - maintain the pre-set program schedule for up to 20% energy savings Electronic temperature control - precision of +/-1 F Large, clear, backlit display - easy to read in various lighting conditions. Soundproofed for quiet operation On/Off switch allows you to turn the thermostat off at the end of the heating season.