Double Unit Display: The DM161R radon detector features a clear LCD screen that shows both double units with touch switching, displaying long / short term averages and testing duration for easy High Precisions Detection: Equipped with professional sensors, this device detects traces radon levels with 1pCi / L accuracy, providing long term data for scientific indoor air assessment Compact & Portable Design: With built in stand and compact 170x70x25mm body, this detector fits living rooms, bedrooms, basements or offices not requiring installation for immediate use Extended Battery Life: Powered by AA batteries with low energy consumption design, it enables continuous without frequent battery changes, ideal for prolonged basement use