Feature 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 , and X rays with high sensitivity and accuracy, reducing errors. 5[Easy To Use] The radiation detection meter features a premium 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.Item Type: Geiger CounterMaterial: ABSProduct Size: Approx. 13.5 x 7 x 3cm / 5.3 x 2.8 x 1.2inGross Weight: Approx. 258g/9.1ozUse: Nuclear Radiation DetectorProduct Parameters:Detection Technology: Geiger Muller Counter TechnologyDetection Type: , and X RayEnergy Range: 20kev-3.2mev30% (137Cs-)Sensitivity: 80cpm/uSV (Co-60)Test Accuracy: 0.01uSv/hReal Time Range: 0-999.9usv/hAccumulation Range: 0-9999msvReal Time Error: 10%Average Error: 3%Battery: Lithium Battery 14500 1300mAh (Two Batteries Required) (Shipped with Matching Battery) Operating Temperature: -5C-40COperating Voltage: DC3.7V . Package List1 x GeigerCounter2 x Battery1 x USB Cable1 x Instruction ManualNoteManual measurement, please allow some errors.