Body Scan catagory includes 3 different types of products, checking human body to inspect contraband goods: 1. Metal detectors could find metal threats including knives, guns, etcs. All products including the common kinds of walk-through metal detectors(WTMD), also named archway metal detectors or door frame metal detectors(DFMD), hand held metal detectors. 2. micro wave 3d body scanners. 3. Teraherts body scan system.  The human body security inspection solutions are widely used in transportation systems like airports, railways and metro, commercial buildings like shopping malls etc for security inspection, law enforcement like prisons.