... Present 1pc 9V battery for each MD-3003B1 Handheld Metal Detector MD-3003B1 Front Side of MD-3003B1 Back Side ... -School examination sites, government offices, airports, various game sites and public places.Prisons, detention centers, public organs, courts, stadiums ... safe efficiency, such as walkthrough metal detector.-Can detect various metals, such as: Copper, Ferrous and Tin etc. Open it to ...