Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White

• ONE WEEK PROGRAMMING: Set one identical program for the entire week with four program periods per day including wake, leave, arrive and sleep. • PRECISE TEMPERATURE CONTROL: Precise temperature control of plus/- 1 degree Fahrenheit • DIGITAL DISPLAY: Easy-to-read digital display with an intuitive interface for one-touch access to setpoint temperature • EASY INSTALLATION: Easy to install yourself and basic operation keeps programming simple • REMINDERS: Built-in battery change reminders (2 AAA batteries are required for operation) • SET POINT RETENTION: Set point is retained in memory in the event of a power outage • DISPLAY OPTIONS: Fahrenheit or Celsius; 12 or 24 hour clock. Note: This thermostat is not backlit. • OVERRIDE OPTIONS: Permanent and temporary override capability • COMPATIBLE WITH: Heating, cooling and heat pumps without auxiliary heat options • Does NOT work with electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling. For indoor use only.