[High-Sensitivity] The nuclear radiation detector uses a professional Geiger counter and an advanced tube as the core sensor, which can accurately detect beta, gamma, and X-rays, with readings updated once per second. Radiation detector detection range: 0.08 ~ 50 mSv/h. [Sound and Light Alarm] Regardless of whether the screen of the personal radiation detector is in sleep or active mode, when the detected radiation dose exceeds the alarm threshold, the device will emit a loud ble alert and a flashing visual alarm. [Low Energy OLED Display] The built-in powerful rechargeable lithium battery allows the nuclear radiation detector to operate continuously for up to 50 hours on a single charge, requiring only 2–3 hours to fully charge. [Pen Folder Design] The size of this Geiger counter is similar to a pen, compact and portable. It can be clipped to clothing, bags, or other convenient locations, providing 24-hour continuous monitoring. [Wide Application Scope] This radiation dose meter is widely used in environments with potential ionizing radiation, such as homes, construction materials inspection, healthcare facilities, industrial manufacturing, nuclear power plants, geological surveys, petrochemical sites, and more. Ideal for use in households, hospitals, and workplaces. Material: Plastic Color: Black Package Contents: 1 x Geiger Counter (other items not included) Note: Due to lighting reflections and display differences, the color in the image may slightly differ from the actual item. Measurement error allowance: +/- 1–3 cm.