Radiation Analysis Instrument: 48mm tube Geiger counter nuclear radiation tester can help you to detect nuclear radiation well, able to detect Gamma, Beta and X. Fast response, a button to operate, range 0.05Sv/h~10mSv/h. Easy to Read: Personal radiation dosimeter has 0.96' color display screen, real time display of instantaneous value, average value, accumulated value and so on. Three Alarm Modes: When the radiation dose exceeds the alarm value, it will will automatically alarm. There are three alarm methods: sound, light andvibration which can better remind you. Portable: Radiation protection equipment, Handheld design, compact size, easy to carry and store in you pocket. Wide Application: This radiation tester is widely used for household, lab, nuclear station, industry, metal processing, environmental testing, radiation protection, etc. Specification: Radiation Tester Type: 48mm tube Geiger Counter Radiation Detection: X, y and hard Test Range: 0.05Sv/h~10mSv/h Working Temps: -20C - 50C Working Time: 15-24hrs Charging Time: 1hrs Charging Type: USB Type C Material: aluminum alloy Size: 1.6cmx2.7cmx15cm/0.63inchx1.06inchx5.91inch Package Includes: 1 Nuclear Radiation Tester Note: Please allow slightly errors due to manual measurement and different monitors.