HIGH SENSITIVITY: Use a precision GM tube as the center sensor. It has automatic data acquisition. a small error and high precision of 0.01 Sv/h, accurate radiation detection. it will automatically alert when the radiation level exceeds 0.5 Sv/h. REAL-TIME DISPLAY: Geiger counter responds quickly to radiation, real time per second Data logging to internal flash memory. The real-time graph mode allows you to view radiation level changes in real-time visualized. The large display allows you to easily and quickly read the values in real time. USB-POWERED OR BATTERY-POWERED: the radiation detector with usb cable. Without using the battery, you can use the charging cable, plug it into the socket and start detecting. You can also use No.3 AA batteries/rechargeable batteries. (battery not included) WIDE RANGE OF APPLICATIONS: Geiger counter can detect nuclear radiation, , , X-ray, and can be easily used for home environment inspection, nuclear power plants, industry, radiation medicine, radioactive laboratory, etc. PORTABLE AND LIGHTWEIGHT EASY TO USE: Small size and portable Geiger counter, easy to carry and put in your pocket. it can be detected immediately after switching on, without calibration, and the data is clear and simple. Even the elderly can use it without any problem.