【High Accuracy】This nuclear radiation detector has a built-in GM sensor with fast response and high accuracy. Wide measuring range and long service life Hersance. Gamma, beta and X-ray radiation detector, measurement range: 0.00~100usv/h. 【Portable and Compact Design】The Geiger counter radiation detector is handheld and portable with a simple and easy-to-understand interface. Featuring three measuring units, the large LCD display allows you to read real-time values easily and quickly. 【Smart Alarm】The radiation detector can set the cumulative alarm value and dose rate alarm value. You can enter the alarm setting option to set up. Once the radiation value exceeds the set value, an alarm will automatically occur, helping to avoid radiation risks in daily life. [Wide application] This radiation detector can be widely used in home decoration radiation detection, radiation processing enterprises, laboratories, geological surveys, nuclear power plants, industry, radiation medicine, radioactive laboratories and other places where ionizing radiation exists. [Packaging list] Nuclear radiation detector*1, instruction manual*1 (requires 3 AA batteries for power, but not included)