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 refrain radiation hazards in daily. If you are looking for a nuclear radiation detector, come and try this product, it will not let you down. Specifications: Material: ABS Color: white, black, yellow (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: 0.5/1.0/2.0/5.0 The use of ambient temperature: -25 ~ #43;45 Relative humidity: less than 95% Power supplys: 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 Packing List: 1 * Nuclear Radiation Detector