Honeywell Home RTH111B non-programmable digital thermostat offers simple, reliable control for heating and cooling systems. Designed for ease of use, it features a large, easy-to-read digital display and precise temperature control within +/- 1 degree Fahrenheit. This mercury-free unit is compatible with various systems including forced air, heat pumps without backup heat, and 750 mV heating systems. The sleek white design fits seamlessly into any home decor while providing essential functions like fan control and system switching.