This radiation tester can be widely used in decoration stone testing, industrial nuclear pollution testing, geological survey testing and so on. The portable design and powerful functions allow you to use it easily and get accurate results. If you are looking for a new tester, come and try this product, it will not let you down. Features: Real-time Detecting&Total Dose: It can detect radiation dose rate in real time and record cumulative dose value at the same time. Three Power Supplys Ways: This detector supports battery and USB two ways of power supplys.  This device can be powered by the built-in button battery or directly by USB cable or 3 * AAA batteries. Various Screen Display Functions: You can adjust the alarm reading value, screen backlight, real-time dose rate curve display function and so on according to your needs. Built-in Data Storage Card: Some data such as accumulated dose value, dose rate alarm reading value and dose alarm threshold value will not be lost after power failure. High Performance Chip: It adopts 32 bit processor, strong anti-interference ability and high detection precisions ranges. Wide Applications: This radiation tester can be widely used in decoration stone testing, industrial nuclear pollution testing, geological survey testing and so on. Easy to Operate: You can enter the setting interface by one button to adjust the alarm preset value, time, Chinese and English switching backlight mode, curve display, particle sound switch and other functions. Specifications: Material: ABS Dose rate ranges: 0.1μSv/h~10mSv/h Dose ranges: 0.00μSv~10Sv Sensitivity: >1cps/uSv/h (under the source of Condition Co60) Relative intrinsic error: <±10% (at 1mSv/h) Alarm threshold: 0.5 (Adjustable) Sensitivity: 80cpm / μSV / Co-60 The maximum dose equivalent rate: 99.99μsv/h Power supplys: 1 * cr1220 battery(included) or USB cable (included) or 3 * AAA batteries(included) Power consumption: <150mW Package size: 160 * 60 * 25mm / 6.3 * 2.4 * 1.0in Package weight: 160g / 5.6ounce Packing list： 1 * Radiation Detector with Battery 1 * USB Cable 1 * User Manual 3 * AAA Batteries