Features： 1、EASY TO READ: The radioactive detector can be digitally displayed and equipped with a backlight for easy reading. 2、 MATERIAL: The Geiger counter is made of ABS material, which is sturdy and durable to ensure long term use. 3、PORTABLE DESIGN: The compact Geiger counter allows you put it inside the pocket and carry it with you, simple user interface, clear, user friendly. 4、MULTIFUNCTIONAL: Nuclear radiation detector has data viewing, saving and output functions. Meet the needs of various work scenarios. 5、MULTI DISPLAY: The screen displays temperature and humidity conditions at the same time, providing more information at the same time. Specification： Item Type: Geiger Counter Material: ABS, LED Weight: Approx. 169g/6.0oz Energy Range: 20kev-3.0Mev≤±30%（137Cs-） Sensitivity: 80cpm / usv / (Co-60) Test Accuracy: 0.01μsv / h Time Range: 0-99.99μsv / h Time Error: < 10% Average Error: < 3% Power Supply: 2 x AA Batteries (Shipped Without Batteries) Type of Detection: β γ and X Rays Detectable Scope of Application: Nuclear Radiation Detection Package List： 1 x Geiger Counter (Battery Not Included) 1 x Manual