1、GM Counting Tube: Using GM count tube, could detect X, γ, and β rays, with wide measurement range of 0.08μSV to 50MSV and high sensitivity. 2、Small and Lightweight: The detector is a pen type design, which can be carried around to detect the radiation level of any object or any environment at any time. 3、Rechargeable: This nuclear radiation tester includes rechargeable batteries that can be charged via USB or car charger for easier use. 4、Nuclear Radiation Alarm: The radiation tester is intelligent and sensitive by providing audible and visual alerts if radiation is detected. 5、Wide Application: This detector can be used to detect the radiation of toys, antiques, building materials, furniture, decoration, food, etc. Item Type: Pen Type Nuclear Radiation Tester Material: ABS Sensor: 48mm Geiger counter tube Measuring Range: 0.08μSv-50mSv Operating Environment: Temperature -20℃-50℃; Humidity <95%RH without dew Endurance: 50Hour (continuous measurement, screen hibernation) Charging Time: 2-3Hour Charging Interface: TYPE C interface (green light is always on when charging, full extinguished) Battery: 1 x 401427 lithium polymer battery, battery capacity 150mAh (built in) 2 x Nuclear Radiation Tester 2 x Charging Cable 2 x Instruction