Product Details  EM technology lowest cost statistics for passenger can be selected  1.Material: Steel mold manufacture 2.Additional option: Traffic flow statistics can be selected 3.Largest channel width: single-aisle 90 cm.(it depending on performance of labels/tags,quality of power source and interference of environment ) 4.This model is installed by their special requirement from medium-sized bookstores, library, pharmacy, store, cosmetics store 5.Certification: it have passed the inspection of the ministry of public security and the test center of police electronic products