Universal 7-day programmable thermostat allows you to set a different schedule for each day of the week. Thermostat has a large, backlit screen. Auto change from heat to cool. Features larger, easy-to-read characters and large keys for easy operation. Other features include: Easy do-it-yourself Install Wizard, precision temperature control +/- deg (degree), temperature limits, furnace filter change reminder, low profile design, keypad lockout. Built-in level for mounting. Will work on most furnaces, air conditioners, and heat pump systems. Not compatible with electric baseboard heat. 2 AA batteries included. Mounting hardware and installation guide included. 3 year limited warranty.