** To ensure environmental accuracy, Radon devices cannot be returned. ** Airthings Wave digital radon monitor offers real time access to your radon, humidity and temperature with reporting and notifications when your levels are too high. 2 day, 1 week, 1 month or 1 year at-a-glance graphs on the free Airthings app. Connectivity will be a breeze with long range and low power wireless communication with the Airthings Hub. Compatible with Google Assistant, Amazon Alexa and IFTTT. Uses AA batteries (estimated 1.5 year lifespan) and includes a wall mounting bracket.