Honeywell Home RTH221B Programmable Thermostat

Set one identical program for the entire week with four program periods per day including wake, leave, arrive and sleep. Precise temperature control of plus/- 1 degree Fahrenheit. Easy-to-read digital display with an intuitive interface for one-touch access to setpoint temperature. Easy to install yourself and basic operation keeps programming simple. Built-in battery change reminders (2 AAA batteries are required for operation). Set point is retained in memory in the event of a power outage. Fahrenheit or Celsius; 12 or 24 hour clock. This thermostat is not backlit.