Features 1、It adopts imported sensor processor with high sensitivity, high accuracy and quick response speed 2、Using LCD 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、Real time detection, rapid measurement, real time update of accumulated dose, simple and intuitive 4、There are three alarm modes: sound, light and vibration, which can better remind you and give you a better experience 5、Handheld portable design, easy to carry and store, you can test anywhere Specification Material: ABS Model:NR 850 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-850≤±10%(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: 2xAA batteries (not included) Package List 1 x Nuclear Radiation Detector 1 x Manual