... failure rate, can detect ferrous metal and non-ferrous metal High sensitivity, detect ferrous metal and non-ferrous metal Technical specificationsOperating frequency: 20 KHzUnit ... : DIP14 IC (integrate circuit) 5mm ; 64 pistol 150mmUse domainFor security use: detecting weapons, such as: knife, gun and so on ... : telephone, electronic dictionary and so on. Body scanner wand handheld metal detector MD200