The natural environment in which we live has a certain amount of radiation, real-time data will fluctuate within a certain range, and the daily use of nuclear radiation detector helps to check radiation hazards in daily. Geiger Counter, Br-9B Digital Display Nuclear Radiation Detector Ionizing Tester,ionizing Tester for Material Environment Power Plant Household Appliance Features: This nuclear radiation detector has high sensitivity, wide measuring rangs and can provide a long service time. Easy to Use: This nuclear radiation detector has smaller body and larger screen, clearer measurement data and easier operation. Wide Applications: This detecotr can be applied to material inspection, environmental test, radiology protection, radiopharmaceutical screening, etc. With mute, alarm, particle sound selection button, test, mean value reset retest selection button, backlight can be turned on or off. Portable Size: Hand-held portable design, easy to carry and store, you can put it in your pocket for carrying. Specifications: Material: ABS Color: black Screen size: 57 * 43mm / 2.2 * 1.7in Detectable types: Beta, Gamma, X-ray Energy range: 20kev~3.0mev30%(137Cs-) Sensitivity: 80cpm/sv/(Co-60). Test accuracy: 0.01sv/h Real-time range: 0-99.99sv/h Cumulative range: 0-99.999msv Real-time error: 10% Mean error: 3% Battery: 3 * AA 1.5V battery(not included) or 3 * 1.2V rechargeable battery(not included) Charging: USB 5V 2A input Charging time: 4 hours Item size: 105 * 70 * 30mm / 4.1 * 2.8 * 1.2in Item weight: 106g / 3.7ounce Package size: 150 * 100 * 55mm / 5.9 * 3.9 * 2.2in Package weight: 122g / 4.3ounce Packing List: 1 * Nuclear Radiation Detector (Battery not included) 1 * User Manual