TPI's Low Voltage Programmable Thermostat - Heat Only is a 7-day programmable thermostat with an LCD screen to display temperature, time, day, mode and heating command. It is compact and stylish and comes loaded with advanced programming features and a large backlit LCD. An ON / STANDBY switch enables thermostat shutdown at end of heating season for added security. On-screen heating power indicator gives at-a-glance verification of power being used and temporary bypass enables temperature override without changing programming. Battery-free backup means no re-programming your schedule after power outage. Thermostat is Energy Star Compliant.