** To ensure environmental accuracy, Radon devices cannot be returned. ** Airthings View Radon digital monitor accurately measures and records radon using the best technology available! Monitor and easily track through the app - radon, temperature and humidity. Customizable display and easy colour coded wave response (red/yellow/green air quality indicators) makes use a breeze! Includes 6 AA batteries for 2 years of continuous use. USB-C connection compatible, Bluetooth compatible, Hub compatible.