Features Imported sensor processor is adopted, with high sensitivity, high precision and fast response speed Real time detection, rapid measurement and real-time update of cumulative dose With liquid crystal display, the working state of the nuclear radiometer can be seen at a glance on the display screen It is hand-held and portable design, which is easy to carry and store. It can be used anywhere It has three alarm modes of sound, light and vibration. 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     Package List