Honeywell 5/2-Day Programmable Thermostat, White: * 5/2-day programming * Offers maximum flexibility for weekday and weekend programming * Save up to 33 percent on energy costs when programmed as directed * 1-degree Fahrenheit range of accuracy to maximize comfort * Works with most heating and cooling systems plus heat pumps without back-up heat * Model #: RTH2300B1012/W