Honeywell RCT8100A 7-Day Programmable Thermostat Program each day differently. up to 4 periods per day (Wake, Leave, Return, and Sleep) and ideal for the busy family Precise Temperature Control - Thermostat holds +/- 1 degree accuracy to maximize home comfort Filter Change reminder to help the HVAC system keep running smoothly Energy Saving Schedule: Preprogrammed with standard energy saving schedule for easy set-up Backlit Display: Easy to read, even in dimly lit rooms and hallways