Feature 1Efficient and Portable: This nuclear radiation detector is designed to be compact and portable, allowing for quick and accurate detection of radioactivity in marble. 2Multifunctional: In addition to marble testing, it can also be used for measuring Geiger counters and ionizing radiation, catering to various detection needs. 3Accurate Alarm: Equipped with an alarm function, radiation monitor can promptly emit warning signals to ensure users receive the latest and accurate radiation information. 4User Friendly: Radiation monitor meter features easy to operate buttons and an intuitive display screen, making it suitable for both ordinary individuals and professionals. 5Widely Used: Widely applied in the environment where existing ionize radiation. Such as home improvement radiation, geological survey, iron, Inspection vehicles, nuclear power plants, industry, radiology, radiology laboratories and so onItem Type: Nuclear Radiation DetectorMaterial: ABSWeight: Approx. 232g / 8.2ozPower Requirement: 2 x AA Batteries (Not Included)Function: The detector can preset dose rate and cumulative dose alarm thresholdsDetected Radiation: X ray, R ray, and hard rayDetector: Energy compensated Geiger tubeMeasurement Range: Dose Equivalent Rate: 0.01-1000 uSv/h (maximum dose: 10 mSv/h)Energy Range: 50 keV-1.5 MeV (30% deviation with 137Cs)Relative Inherent Error: 15% (137Cs, 1 mSv/h)Sensitivity: 80 cpm/uSv/h (e.g. Co-60)Alarm Thresholds: Dose Rate: 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10.0, 50.0, 100.0 Sv/h .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Nuclear Radiation Detector1 x English User ManualNoteSee the instructions for details.