With GM tube as the core sensor, our radiation detector has accurate measurement, high sensitivity and wide range measurement. Built-in memory helps the radioactive detector store the accumulated dose value and dose alarm threshold data when there's power off. When the battery power of our radiation detector is used up, you can replace it with new battery, or use the USB cable to plug in directly. The main function of this radioactive detector is to monitor X-ray, -ray and -ray. Simple to operate and has a strong anti-interference ability. The radiation detector is widely used in nuclear power plant, ironandsteel industry, chemical industry, isotope application, radioactive medical treatment, radiation, radioactive lab, etc.Specification: Power Supply: 3xAAA battery or USB cable Size: 116x60x25mm Weight: 145g Package Size: 160x60x25mm Package Weight: 160g Packing List: 1 x Radioactive Detector Meter 1 x User Manual 3 x AAA Battery 1 x USB Cable 1 x Screwdriver