Features:1. It adopts a small and portable user interface, which is simple and clear, easy to use and humanized.2. The Geiger radiation detector has the characteristics of wide measurement range and long service life. It can be used for radiation detection and monitoring in indoor and outdoor and other similar environments.3. The nuclear radiation monitor responds quickly to radiation, and timely alarms in high-risk environments. The instrument is highly flexible and can measure ambient background.4. Widely used in individual safety protection monitoring and radioactive indication of workers in nuclear power plants, accelerators and other fields.5. The handheld nuclear radiation detector is small and portable. The unit of the detector is Sv/h.Package size: 19*9*7cmPower supply: plug-in use or 3 AAA batteries