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 avoid radiation hazards in daily life. Features: High sensitivity, wide measuring range, has a long service life. Using of sophisticated G-M tube as the core sensor. Can be applied to material inspection, environmental test, radiology protection, radiopharmaceutical screening, etc. Compact and portable, the operation interface is simple and clear, easy to use. Specifications: Material: ABS Color: White, Black (Optional) Detectable species: Beta, Gamma, X-ray Sensor type: G-M tube Energy range: 50kev-1.5mev less than 30% Relative intrinsic error: less than plus or minus 10% Sensitivity: 80cpm / SV / Co-60 The maximum dose equivalent rate: 99.99sv/h Voice source: real particle sound / alarm sound / mute Alarm threshold: 0.5 (Not Adjustable) The use of ambient temperature: -25 ~+45 Relative humidity: less than 95% Power supply: 2 * AA battery (not included) or USB cable (not included) Item size: 135 * 70 * 38mm / 5.3 * 2.8 * 1.5in Item weight: 145g / 5.1ounce Package size: 150 * 80 * 50mm / 5.9 * 3.1 * 2.0in Package weight: 160g / 5.6ounce Package list: 1 * Nuclear Radiation Detector 1*English manual