Features: This Nuclear Radiation Detector adopts complex for GM tube as the core sensor, the error is small, high accuracy in 0.01 USV/h, ensure an accurate measurement. The professional geiger counter built-in latest senor to easily detect the radiation, large measuring range and high accuracy, long service life. Compact and portable geiger counter allows you put it inside the pocket and carry it with you, simple user interface, clear, user-friendly. With a variety of charging methods, which can be operated by USB port and battery, convenient and easy to use. Widely applied in material testing and radiation testing, great for daily, hospital, industrial and more. Specifications: Material: Plastic Size: 11x7x3cm/4.3x2.76x1.2in Color: white & black Package Includes: 1X Radiation Detector note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.