Features: Both nuclear radiation and electromagnetic radiation can be detected. It can meet the needs of home life detection, substation detection, mobile signal tower detection,etc. Update once every second to quickly display the true values of each moment, characterized by large fluctuation and high consistence with sensors detection results. That is, add all the detected doses, and the data will not be lost after shutting down, and historical data will continue to be accumulated after booting up again, and there will be long-term cumulative sum values. 4 in 1: Geigers nuclear radiation, Electromagnetic radiation detector, Temperature and Humidity detection. Small size, very convenient for daily use, you can put it in your pocket without taking up much storage space. Specifications: Material:ABS Size:Approx.10.7cm/4.21'x7cm/2.76'x3cm/1.18' Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Geigers Counter