Portable Size: This handheld nuclear radiation detector is portable in size and easy to carry, so you can put it in your bag and take it with you and grip it for use. Radiation Detect: The detector is used to measure X, and rays radiation, it is optimal for measuring small changes in radiation levels, and has high sensitivity for most commonly used nuclides. The detection is more accurate. Multifunctional Design: The alarm value can be set by user, it will promote an alarm sound when over the limit ranges, and timely alarm to ensure safety use. Sound, flashing light and vibrating triple alarm functions. Wide Applications: This radiation tester can be widely used in nuclear power plants, accelerators, the iron & steel industry, the chemical industry, isotope applications, radiology laboratories and ambient monitoring of nuclear facilities. Battery:1 x lithium battery (included) Detection rays:X, , hard rays Measurement ranges:0.08-9999Sv/h Working environment:-10-50; less than equal 95%RH humidity Charging mode:USB Type-C Attention: 1. This product contains a lithium battery. Please use a standard DC-5V power supply to charge it. 2. Do not use this product in high temperature and high humidity environments to avoid inaccurate data or circuit failure. 3. Do not use this product in ultra-high radiation environment, so as not to damage the sensor. 4. This product is not waterproof. Please avoid water droplets or use them underwater. 5. This product contains precision electronic components. Please do not pierce the needle or sharp object into the product. Colour:Black Material:ABS Size:about 100x40x25mm/3.94x1.57x0.98in Package Contents: 1 * nuclear radiation detector 1 * usb cable 1 * English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.