Features： 1、[For Construction Materials] Geiger counter can be used to detect radiation from marble and tiles. Building materials may contain naturally occurring radionuclides, which can pose a threat to your health. 2、[Jewelry Applications] This Geiger counter can also be used to detect radiation levels in necklaces, rings, etc. This is especially true for zirconium contained in jewelry, jewelry should be decorative, not destructive. 3、[Food Applications] Food can accumulate radiation if grown in contaminated areas, the radiation detector can also be used for food (especially berries and mushrooms), so you can enjoy safe cooking. 4、[Accurate And Sensitive] Nuclear radiation detector uses professional counter technology and is capable of detecting β, γ and X rays with high sensitivity and accuracy, reducing errors. 5、[Easy To Use] The radiation detection meter features a blue LCD screen that provides a clear display of data and is easy to read. Compact size and light weight for on the go use. Specification： Item Type: Geiger Counter Material: ABS Product Size: Approx. 13.5 x 7 x 3cm / 5.3 x 2.8 x 1.2in Gross Weight: Approx. 258g/9.1oz Use: Nuclear Radiation Detector Product Parameters: Detection Technology: Geiger Muller Counter Technology Detection Type: β, γ and X Ray Energy Range: 20kev-3.2mev≤±30% (137Cs-) Sensitivity: 80cpm/uSV (Co-60) Test Accuracy: 0.01uSv/h Real Time Range: 0-999.9usv/h Accumulation Range: 0-9999msv Real Time Error: 10% Average Error: ≤3% Battery: Lithium Battery 14500 1300mAh (Two Batteries Required) (Shipped with Matching Battery) Operating Temperature: -5 DegreeC-40 DegreeC Operating Voltage: DC3.7V Package List： 1 xGeiger Counter 2 x Battery 1 x USB Cable 1 x Instruction Manual