Honeywell PRO 800 is a programmable thermostat that gives you precise control over your home's temperature. With its large display and intuitive interface, it's easy to use and can be programmed to fit your unique schedule. The PRO 800 also has a number of advanced features, such as geofencing, which uses your smartphone's location to automatically adjust the temperature when you're away from home. It can also be controlled remotely via the Honeywell Home app, giving you the ability to change the temperature from anywhere.