Features 【Real-time measurement】Real-time detection, rapid measurement, real-time update of accumulated dose, simple and intuitive. 【LCD display】Using liquid crystal display, the working status of the nuclear radiometer is clear on the display screen, and you can quickly and accurately read the data you need. 【3 alarm modes】There are three alarm modes: sound, light and vibration, which can better remind you and give you a better experience. 【High-precision sensor】The nuclear radiation detector adopts high-precision sensor processor, with high sensitivity, high precision and fast response speed. 【Easy to carry】Hand-held portable design, Geiger counter radiation tester is easy to carry and store, you can test anywhere. Specifications: Material: ABS Model: NR-750/NR-850/NR-950 (optional) Detection rays: X, Y and hard beta rays Dose equivalent rate: 0.01~1000μSv/h (maximum 10mSv/h) Cumulative dose equivalent: 0.01μSv~500.0mSv Energy response: 48KeV~1.5MeV≤±30% (for 137CS-) Relative inherent error: NR-750≤±15%(137CS1mSv/h) NR-850≤±10%(137CS1mSv/h) NR-950≤±3%(137CS1mSv/h) Language: English, Chinese Sensitivity: 80CPM/uSv (for Co-60) Alarm threshold: Dose rate: can be arbitrarily selected among 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0μSv/h Cumulative dose: can be selected at 0.05, 0.5, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0, 100.0mSv Power supply: 2*AA batteries (not included) Packing size: about 172*126*36mm/6.8*5.0*1.4in Package weight: about 200g Packing list: 1 * Nuclear radiation detector 1 * Manual Notes: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3mm measuring deviation due to manual measurement. Package List