[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 updates 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 protect you and your family. [Low Energy OLED Display] Built-in powerful rechargeable lithium battery; the nuclear radiation detector only needs to charge for 23 hours and can operate continuously for up to 50 hours after full charge. [Pen-Style 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, healthcare facilities, manufacturing sites, nuclear power plants, geological surveys, petrochemical industries, and more. Ideal for home, workplace, and travel 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 +/- 13 cm.