Thedose rate is measured in real time, stableperformance, high accuracy. Thedose rate alarm value and the metering alarm threshold can be set by pressing the button. With over-dose alarm function. Small size and compact, lightweight, easy to carry with, fit for indoor, outdoor, home, hotel, etc. Highdefinition display, the display is clearer, and it can be displayed normally at night. Built-in rechargeable battery, Type-C port, which can be used for long time after being fullycharged. RadioactiveTester GeigerCounter Electromagnetic Nuclear Radiation Detector Real Time Monitoring Auto Exceedance Alarm Meter Features: Thedose rate is measured in real time, stableperformance, high accuracy. Highdefinition display, the display is clearer, and it can be displayed normally at night. Small size and compact, lightweight, easy to carry with, fit for indoor, outdoor, home, hotel, etc. Built-in rechargeable battery, Type-C port, which can be used for long time after being fullycharged. Thedose rate alarm value and the metering alarm threshold can be set by pressing the button. With over-dose alarm function. Specifications: Material: ABS Size: Approx. 16x27x105mm/0.63x1.06x4.13in Range: 0-10mSv/h Accuracy: 0.001Sv/h Color: Black/White Package Includes: 1 Set GeigerCounter Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.