Portable Size: This handheld nuclear radiation detector with portable size and easy to carry, you can put it into your bag to carry and hold it to use.Large Display Screen: This nuclear radiation detector adopts large LCD display screen for you to read the detecting data clearly and easily.Over Safety Value Alarm: The alarm value can be selected from 0.5, 1.0, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0usv/h. You can choose the suitable value according to your needs.Easy to Operate: You can enter the setting interface by one button to adjust the alarm preset value then close the tester to object to get the result. 2xAAA Battery not includedWide Applications: This radiation tester can be widely used in nuclear power plant, accelerator, iron & steel industry, chemical industry, isotope application, industrial X and r non-destructive flaw detection, r radiation, radioactive laboratory and surrounding environment monitor of nuclear facilities."