High-sensitivity radiation detector features a professional Geiger-Muller tube as the core sensor, capable of accurately detecting alpha, beta, gamma, and X-ray radiation with updates every second. Detection range: 0.08 to 50 mSv/h. Equipped with ble and visual alarm functions. When radiation levels exceed the preset threshold, the device emits a loud alert sound and screen flash, regardless of whether the display is active or in sleep mode, helping to ensure personal and family safety. Features a low-energy OLED display and built-in rechargeable lithium battery. The device requires 2–3 hours of charging and supports continuous operation for up to 50 hours. Compact pen-style design for portability and convenience. Easily clips to pockets, bags, or other preferred locations, enabling 24-hour continuous monitoring. Suitable for a wide range of applications including homes, hospitals, nuclear facilities, industrial sites, construction materials inspection, petrochemicals, geological surveys, and environmental radiation monitoring. Ideal for use in both personal and professional settings. Material: Plastic Color: Black Package Contents: 1 x Geiger Counter Note: Light reflection and differences in display screens may cause slight variations in color appearance. Measurement error allowance: ±1–3 cm.