AT-200C 2017 new model 6 zones LED display main box type walk through metal detector for indoor use. Highlights: 1.Detecting zones :6 zones 2.Working frequency range to be 1-100bands,can automatically be adjusted. 3.Sensitivity of single zones to be 400grades (can be adjustable) 4.Self-adaption diagnosis system: When turn on, system will detect adaptively hardware working status. 5.Adopting luminium cover and packing edge to be stronger and stable