Feature: 1. Building Detection: This geiger counter can be used to detect radiation in building materials and marble. Building materials may contain natural radionuclides, and they can pose a huge threat to your health. 2. Jewelry Detection: Nuclear radiation detector can be used to detect necklaces, rings or other jewelry. Precious metals and stones can have high radiation levels, especially zirconium, which is the most commonly used in jewelry. 3. Food Detection: If grown in a contaminated area, it is sure to accumulate radiation.Geiger Counter can check the radiation safety of food (especially mushrooms and berries) and enjoy safe cooking. 4. High Accuracy: This radiation detector meter detects B, y and X rays with high sensitivity, high accuracy and minimal error; data display is clear and easy to read; compact and portable. 5. Rechargeable Battery: The radiation dosimeter is powered by a 1300mAh lithium battery, USB rechargeable, and can be used for indoor and outdoor radiation detection and monitoring, and other similar environments. Specification: Item Type: Geiger Counter Material: ABS Size: Approx. 13.5 x 7 x 2.3cm/5.3 x 2.8 x 0.9in Detection Type: B, y and x Ray Energy Range: 20kev-3.2mev≤±30% (137Cs-) Sensitivity: 80cpm/uSv (Co-60) Test Accuracy: 0.01uSv/h Real Time Range: 0-999.9uSv/h Accumulation Range: 0-9999msv Real Time Error: 10% Average Error: ≤3% Battery: 2 x 14500 1300mAh Lithium Battery (included) Plug: USB Cable Use: Nuclear Radiation Detector Gross Weight: Approx. 246g/8.7oz. Package List: 1 x Geiger Counter 1 x Manual1 x USB Cable2 x Battery Note: Please allow some errors due to manual measurement.