USER FRIENDLY DESIGN: Featuring intuitive buttons and a clear display, this radiation detector is for both novices and professionals, offering easy and convenience in usage. ALARM SYSTEM: Equipped with a highly responsive alarm function, it promptly alerts users with warning signals, providing the latest and most accurate radiation information for enhanced safety. EFFICIENT PORTABILITY: This compact nuclear radiation tester is designed for easy carrying and delivers fast and precise detection of radioactivity in marble, providing accurate and results. USE: Crafted from ABS materials and subjected to rigorous testing and quality control, this nuclear radiation tester provides long term and dependable performance for reliable use. VERSATILE FUNCTIONALITY: In addition to testing marble, it can also measure Geiger counter and ionizing radiation, meeting a wide range of testing requirements with exceptional accuracy. ASIN B0CJ8DX1KT Item Weight 0.16 ounces Item model number Shipenophy4vudzcrikt-12 Package Dimensions 5.51 x 2.36 x 1.57 inches