Intelligent alarm: The nuclear radiation detector adopts high-precision tube as the core sensor, and the Geiger counter radiation detector can automatically record data. The alarm value can be from 0.5, 1.0, 2.0, 2.5, 5.0, 10.0, 50.0usv/h. When the radiation value exceeds the set value, the Geiger counter nuclear radiation dosimeter will automatically alarm, the sound is loud and the screen flashes. High precision and LCD display: The gamma X-ray tester has a built-in high-sensitivity Geiger- counter for high measurement accuracy and small error. This radiation monitoring digital meter features a color display that allows you to read average and real-time values easily and clearly. LIGHTWEIGHT AND EASY TO OPERATE: This handheld portable dosimeter has a lightweight design, you can put this portable radiation detector in your bag and take it with you anywhere. The marble radioactive alarm counter is simple and easy to operate. It can be measured immediately when it is turned on, and no calibration is required. The radiometer will automatically display the data during the product testing process, so even beginners can easily operate it. Wide measurement range: portable nuclear radiation dosimeters can be widely used in nuclear plants, industrial X and r nondestructive testing, r radiation, ore, jade, marble decorative materials, steel industry, chemical industry, radioactive laboratory nuclear facilities surrounding environmental monitoring. USB charging: The LCD screen of the nuclear radiation detector can be charged through USB motion, which is convenient and fast, has a long service life, and has high sensitivity without worrying about the battery radiation meter. Colour:White Material:ABS Package Contents: 1 x Geiger Counter 1 x USB Charging Cable 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.