... Alarm & LED alarm,Harmless to human body alkthrough Metal Detector ZLZX-2101II (6 detecting zones) Technical parameterElectric ... : High, middle, Low for different requirements. Preset the metal size, weight, volume, location to exclude the coin, ... Through Metal Detector ZLXZ-2101II is designed for Exhibition center, Electronic Factory, Bank, Prison, Government office, Casino etc. walk through metal ...