1.8" Color Screen: This geiger counter uses a 1.8" color screen and features a trend chart display function, easy to read data and easy operation. Handy portable design, easy to carry and store, you can put it in your bag to carry. The alarm threshold is freely adjustable, you can adjust the data according to your needs. 3 ALARM WAYS - When the detected radiation exceeds the standard, you will be reminded by a triple alarm mode with sound, light and color display. High precision, high stability, high sensitivity and instant response of 3-5 seconds, you can quickly retrieve the test data and give you a better user experience. Atomic radiation is a problem that everyone needs to pay attention to as it can have serious consequences such as diseases or even cancer. Our nuclear radiation detector can help you detect nuclear radiation well. So when you need it, come and try it, it won't let you down. Features: The alarm threshold is freely adjustable, you can adjust the data according to your needs. 3 alarm options: when the detected radiation exceeds the standard, you will be reminded by a triple alarm mode with sound, light and colour display. High precision, high stability, high sensitivity and instant response of 3-5 seconds, you can quickly retrieve the test data and give you a better user experience. Wide applications: this radiation tester can be widely used for testing decorative stones, testing industrial atomic pollution, testing geological examinations, etc. Specifications: Material: ABS Charging voltage: 5 V Charging current: 1A. Indicator light: green light lights up and indicates charging When the green light is off, this means full power. Battery: 1 x 3.7V 1000mAh lithium battery (included) Detectable species: ,0, X-rays, iodine 131. Sensors: j302 tube Real-time dosage range: 0.00-9.99msv/h Cumulative dosage range: 0.00-500msv Sensitivity: 0.25 cps/usv/h Energy response: 48 kev-1.5 mev Resolution: 0.01 usv/h Error: 10%. Item Size: 89 * 50 * 18 mm / 3.5 * 2.0 * 0.7 inch Package size: 90 * 50 * 18mm / 3.5 * 2.0 * 0.7 inch Package Weight: 143g / 5.0oz Box contents: 1 x Geiger counter. 1 x USB cable