Features:  Portable Size: Hand-held portable design, easy to carry and store, you can put it in your pocket for carrying.  Dose Rates&Alarm Thresholds Preset: This device support preset the dose rates and alarm thresholds, the dose equivalent rate mesuring ranges is 0.01~100uSv/h.  LCD Display: This tester adopt a large display screen for you to see the detecting data clearly, you can see the detecting data more clearly.  This personals geiger counter can detect the X-rays, γ-rays, β-ray and  iodine 131 for you, and this product adopt geiger counter sensors.  Wide Applications: This tool can be widely applied in radioactive indication for the work personnel in the following fields: nuclear power plant, accelerator, iron & steel industry, chemical industry, isotope application, industrial X-y nondestructive flaw detection, Cobalt source treatments and so on.    Specifications:  Material: ABS  Radiation Detection: X, y and hard ß rays  Normal content standard: within 0.5uSv/h  Measurement ranges:  Dose equivalent rate: 0.01~100μSv/h  Alarm threshold: Dose rate: can be arbitrarily selected in increments of 0.05pSv/h within 100.0μ Sv/h  Working environment:  Temperature -10°C~+45°C  Relative humidity: ≤95%(+45°C)  Power: 2 * AA batteries (NOT INCLUDED)  Package size: 140 * 80 * 30mm / 5.5 * 3.1 * 1.2in  Package weight: 200g / 7.1ounce    Packing list:  1 * Geiger Counter