Nuclear Radiation Detector Marble Radioactivity Tester $ 97.42 Product information: Dose rate alarm threshold: adjustable in full range Detector: GM technical tube Cumulative dose alarm threshold: adjustable in full range Dose Rate: 0.05uSv/h-5000uSv/h Protection alarm response Time:<10 seconds Cumulative Dose: 0.1 uSv-9999mSv Protection alarm mode: sound and light alarm Basic error:-17%~ +25% Power supply mode: lithium battery power supply Packing list: Nuclear Radiation Detector*1 Product Image: