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 Alert Systems: Automatically visual warnings when radon levels thresholds, helping protect your family from potential radon exposure risks in real time 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 Extended Battery Life: Powered by AA batteries with low energy consumption design, it enables continuous without frequent battery changes, ideal for prolonged basement use