Water-proof Hand Held Metal Detector Adjustable high sensitivity,Fast scan Light&small,easy carry Long life ... CE RoHs Mini Water-proof Hand Held Metal Detector (Treasure Hunting)Features1. Super sensitivit as one coin: 30-60mm2. Easily adjust ... This mini hand held metal detector is especially for treasure hunting, also applied in Airports, Sporting Events, Prisons, Nuclear Facilities, Correctional ...