... the product can detect item with infrared Anti-counterfeit material. 2,Application methoTo aim the detector head at the item, to press ... covered by paper, plastic, cloth etc. the detector can still pass through and detet. 3,SpecificationSize:20 X 4.5 X ... if need special shell, we can make accordingly) 4,Feature and Advantage Strong concealment,High sensitivity,Simple application, No environment limit ...