Standard Features - Electronic Temperature Control - Precision of +/- 1 degree F saves up to 10% on heating bills - 7-Day Programmable Modify the schedule to fit your lifestyle and help save energy - Instructions On-Board Programming instructions available on the inside cover of the thermostat - Precision Temperature Display Displays temperature to one tenth of a degree - Heating Indicator At-a-glance confirmation that the heat is on - Early Start Ensures programmed temperature is reached by programmed time - Low Battery Indicator Gives 60 day warning to replace batteries - System Protection Activates the hydronic system for one minute every 24 hours to prevent hydronic system seizures - System Flexibility Also works with gas, oil, and some electric heating or hot air systems - Model: TL8100A1008