The National Geographic Metal Detector puts you on a path to discovering coins, jewelry and artifacts by alerting you to metals buried up to 8 inches below the surface and providing critical information about these finds using tone alerts and identifiers on the LCD screen. Features include functions to filter out junk metals and a pinpoint option for deciding the best place to dig. The detector has a water-resistant coil and comes with headphones. Detector finds precious metals buried up to 8 inches below the surface Seven different tone alerts identify types of hidden metals Large LCD screen provides information on depth and metal type and allows users to adjust sensitivity Pinpoint function helps narrow down where to dig Coil is water-resistant so users can search shallow puddles and damp areas Padded arm cuff and adjustable length add comfort while searching Headphones included