You are Buying a brand New And Factory Sealed Airthings Corentium Home Battery Operated Digital Radon Detector.. Product Overview Radon is a radioactive gas that is found in all homes. It is the leading cause of lung cancer among non-smokers and kills 6x more people than home fires and carbon monoxide poisoning combined. It is invisible, is found everywhere and fluctuates daily. Radon is 1 of the most important components in our indoor air quality and the only way to know if you are exposed to radon is to measure daily. Every home needs a radon detector. The Corentium Home Radon Detector by Airthings will provide you with detailed information about radon levels in your home. View daily, weekly and long term measurements on the LCD display. Use the data to take the necessary steps to protect your home and loved ones from the dangers of radon gas. Quick results: receive your first radon measurement within 24-hours Unlike a charcoal test, our detectors are unaffected by electromagnetic interference and dust, perform optimally in humidity less than 85% and can be reset and re-used infinitely Continuous monitoring: radon gas fluctuates daily and accessing your radon levels in real time is necessary to minimize the potential health effects Easy to understand - LCD screen displays the average daily, weekly and long term concentrations Advanced technology: the internal architecture of the corentium home radon detector comes from advanced technology normally reserved for commercial-type detectors Every room in your home has a different radon level, the corentium home by Airthings can check all of the rooms in your home by starting a new measurement 3 AAA batteries (included) - no hard-wiring required