The Honeywell Home RTH221B1039 1-Week Programmable Thermostat is a reliable and efficient device for controlling your home's heating and cooling system. This thermostat features a digital display, 1-week programmability, and low voltage protection. It is powered by AAA batteries and has a white finish with a rectangular shape, making it easy to install on the wall. With its smart home compatibility and universal compatibility, this thermostat offers convenience and flexibility for your home needs.