Portable Size: Hand- 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 display screen to see the detecting data clearly, you can see the detecting data more clearly. This personals geiger counter can detect the X-rays, -rays, -ray and iodine 131 , 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: Power: 2 x AA batteries (NOT INCLUDED) Radiation Detection: X, y and hard rays Normal content standard: within 0.5uSv/h Measurement ranges: Dose equivalent rate: 0.01~100Sv/h Alarm threshold: Dose rate: can be arbitrarily in increments of 0.05pSv/h within 100.0 Sv/h Working environment: Temperature -10C~+45C Relative humidity: 95%(+45C) size: 135 x 70 x 25MM Material: ABS colour: black Package Contents: 1 x Geiger counter (without 2 x AA batteries) 1 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.