Honeywell YRTH8500D1008 7-Day Programmable Thermostat Easy-to-use, extra large backlit touch screen display with menu-driven programming Precise temperature control of +/-1-degreesF with auto change from heat to cool. Energy Star Rated 7 day programming with 4 programmable periods per day Exclusive Honeywell Smart Response Technology with filter change reminder and low battery indicator Compatible with heating and cooling plus heat pump systems*