Advanced Accuracy: Featuring a cutting-edge semiconductor radon sensor, this detector is engineered with triple-sided high diffusion ventilation holes. These design elements rapid gas entry and precise radon level readings, updating every 30 minutes after the initial 6-hour data display. Customizable Alerts: your home's safety with both audible and visual alarms that can be set to your preferred thresholds. This radon detector is designed to alert you effectively, catering to various user needs and ensuring peace of mind. Dedicated Long-Term Monitoring: Protect your household with our radon detector that offers continuous monitoring of radon levels, which are known to fluctuate daily. It features a historical data function that can record up to 504 days of radon levels, storing data every 6 hours across 10 detection records. User-Friendly Interface: Navigate effortlessly with a 2.0-inch color TFT screen that facilitates easy mode itions and setting adjustments. The clear display ensures that radon levels can be read from a distance, enhancing user convenience and safety. Extended Battery Performance: Equipped with a long-lasting battery that supports up to 45 days in ECO mode and includes a Type-C fast charging cable that fully charges the device in just 3.5 hours. Printing words are random, no specified words are accepted Color: Silver & black Material: plastic Package Contents: 1 x radon detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.