Item Type: Nuclear Radiation Detector Weight: 101g / 3.56oz Material: ABS Battery Type: Lithium ion battery (shipped with built in battery) Battery Model: 9V 6F22 Battery Capacity: 1100mAh Battery Quantity: 11Efficient and Portable: This nuclear radiation detector is compact and portable in design, and is capable of quickly and accurately detecting radioactivity in marble. 2Versatile Use: In addition to marble testing, it can also be used to measure Geiger counters and ionization metrology for a wide range of inspection needs. 3Accurate Alarm: With the alarm function, it can send out warning signals in time to ensure that users get the latest and accurate radiation information. 4User Friendly Design: Featuring easy to operate buttons and intuitive displays, it is ideal for both laymen and professionals. 5Reliable and Durable: This radiation detector is made of premium materials and undergoes rigorous testing and quality control for long term reliable use. 1 x Nuclear Radiation Detector 1 x English Manual