Portable Size: This portable nuclear radiation detector with portable size and easy to carry, you can put it in your pocket to carry and hold to use. Wide Applications: This radiation tester can be used in nuclear power plant, accelerator, iron and steel industry, chemical industry, isotope application, industrial X and R fault detection, R radiation, radioactive laboratory and nuclear facility environmental monitoring. Large Screen: This nuclear radiation detector has a large LCD screen that allows you to read the detection data clearly and easily. You can get the results in time. Alarm when safety value exceeded: The alarm value can be selected from 0.5, 1.0, 2.0, 2.5, 5.0, 10.0, 50.0 and 100.0 usv/h. You can choose the appropriate value according to your needs. Two Data Display: This tester can display real-time measurements and cumulative dosages. Three selective alarm modes: sound, light and vibration to better remind you. Specifications: Color: Black Material: Plastic Screen: LCD digital display with backlight Radiation detection: X-rays, -rays, hard -rays Energy range: 50keV~1.5MeV30% (same as 137Cs ) Normal amount: within 0.5 sv/h Relative intrinsic error: 15% (137CS 1mSv/h) Detector: Energy compensation GM tube (Geiger counter) Sensitivity: 80CPM/Sv/h (same as Co-60) Unit: Sv/h, Gy/h, mR/h Dose equivalent rate (DER) measurement range: 0.01 ~ 1000 Sv/h (max. 10 mSv/h) Dose Equivalent Rate (DER) Alarm Setting: Choose from 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0 Sv/h Operating Environment: -10~45, 95% RH (45) Built-in battery: 2 * 3.7V 1200mAh lithium battery Packing size: 13.5*7*2.5cm Package weight: 260g