Features Three Alarm Modes: There are three alarm modes: sound, light and vibration, which can better remind you and give you a better experience. Clear 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. High Sensitivity: It adopts imported sensor processor with high sensitivity, high accuracy and fast response rate. Rapid Measurement: Real-time detection, rapid measurement, real-time update of accumulated dose, simple and intuitive. Data Storage Function: With automatic data storage function, even if the power is suddenly cut off, the data will not be lost and can be stored for a long time. 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   Features: It adopts imported sensor processor with high sensitivity, high accuracy and fast response rate. 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. Real-time detection, rapid measurement, real-time update of accumulated dose, simple and intuitive. With automatic data storage function, even if the power is suddenly cut off, the data will not be lost and can be stored for a long time. There are three alarm modes: sound, light and vibration, which can better remind you and give you a better experience. Hand-held portable design, easy to carry and store, you can test anywhere.   Packing list:  1 * Nuclear radiation detector 1 * Manual     Package List