Introducing the new Lux CAG1500, a new, fully programmable thermostat that not only gives homeowners the advantage of automatic temperature control, but also has the added benefit of helping to keep a home’s air clean. What makes it all possible is the CAG1500’s innovative Clean Cycle™, a feature that ensures the heating and air conditioning fan runs for a set duration of time each hour to circulate and filter the air in the home. The Clean Cycle™ is programmable as well, allowing homeowners to program the fan to run anywhere between 9 and 60 minutes each hour. The CAG1500 also includes a comprehensive graphical filter monitor that indicates when the filter needs cleaning for optimum air quality and system performance. Summary of Features: Fully Programmable IAQ, Clean Cycle TM (Patent Pending), Comprehensive Graphical Filter Monitor (Patent Pending, ) Nonvolatile Memory for All Programs and Settings, Electronic Accuracy, Large Easy to Read Display, EL (Electro Luminescent) Backlight, 7 Day Programmable - Each Day Can Be Different, Easy to Use LUX Speed Dial®, Battery Powered (2 “AA” Batteries Not Included) WARNING: When Replacing Batteries Use Energizer® or DURACELL® Alkaline Batteries Only.