Balanced & Stability: The HOUND-1085 integrates a high-accuracy semiconductor radon sensor with triple-vent design to accelerate radon diffusion. Initial reading appears in 6 hours, with automatic hourly updates for real-time accuracy Compact & Rechargeable: Palm-sized and , makes it easy to move between rooms for full-home radon tracking. Recharge in just 3.5 hours with over of continuous monitoring Support Short and Long-Term Tracking: Easily review radon levels any timeframe - from short-term overviews (6/24/48/96 hours) to long-term history data (up to 504 days). Live hourly updates with 6-hour auto-logging, all displayed instantly on device, no lab delays Audible & Visual Alarm: Color-coded bars indicate radon levels, paired with customizable sound alerts to promptly warn of elevated concentrations, enabling timely actions to safeguard your family's health Hign-concerned Chemical:None power:Rechargeable Ultra Long Endurance Lithium Battery Product Name:Radon Detector Function:Radon alpha gamma X rays Charging:USB TYPE-C(Green light when charging) Operating Range:-10-45 RH Less than 90% (out-of-range operating error increases) (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:ABS Package Contents: 1 * 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.