The THD quickly and effectively targets all ferrous, non-ferrous and stainless steel weapons, contraband and other metallic objects. It's unique 360°, 3½ inch detection area allows unrestricted scanning angles for fast and accurate hands-free body searche SPECS: Scan area: 3.5L X 360° Waterproof and dustproof construction Tip pinpointing Ultra-sensitive quick response to metal objects Accurately detects ferrous and non-ferrous metallic objects 360° detection area