[High Sensitivity] The nuclear radiation detector uses a professional Geiger counter and an advanced tube as the core sensor, which can accurately detect gamma rays 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 audible alert and flashing visual alarm to ensure safety for you and your family. [Low Energy OLED Display] Built-in powerful rechargeable lithium battery; the nuclear radiation detector requires only 23 hours of charging and can operate continuously for up to 50 hours after full 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, manufacturing facilities involving radiation sources, healthcare settings, government agencies, nuclear power plants, petrochemical industries, and geological surveys. Ideal for home, workplace, and professional use. Material: Plastic Color: Black Package Contents: 1 x Geiger Counter Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.