Features: The natural environment we live in has a certain amount of radiation, and the real-time data will fluctuate within a certain range. Daily use of nuclear radiation detectors can help avoid radiation hazards in daily life. High sensitivity, wide measuring range and long service life. It can be used in material inspection, environmental test, radiation protection, radiopharmological screening and so on. Compact and light, the operation interface is simple and clear, easy to use. Specification: 100% brand new with high quality Detection rays: X, y and hard beta rays Detector: Energy compensated GM tube (Geiger counter tube), low energy response is improved Normal content standard: within 0.5Sv/h. Measuring range Dose equivalent rate: 0.01100Sv/h Alarm threshold: can be arbitrarily selected in increments of 0.05Sv/h within 100.0Sv/h. Measurement display: the dose rate is displayed every second, and the protection alarm response is less than 5 seconds. Use environment: temperature -10C+45C Relative humidity: 95%(+45C) Size: 135x70x 24mm/5.31*2.76*0.94 inch Package Included: 1 x radiation detector (Battery is not included)