Easy to use and tested to be accurate, the Corentium radon gas monitor features an LCD display that shows you at a glance short-term, 7-day, and 1-year averages, informing you of any potentially hazardous levels of radon gas in your home. Powered by 3 AAA batteries (included), this portable device is easy to move from room to room. | Airthings Corentium Radon Gas Monitor