Pyle PHMD3 Treasure Hunter 3000 Discriminating Metal Detector, Waterproof Submergible Search-Coil and Headphone Jack Full-Featured and Easy-to-Use Metal Detector - Finds Precious Metals Buried Underground Discrimination Ability Identifies Precious Metals from Lesser Metals - Control Box with View Meter 3 Operating Modes to Distinguish Between Metals - Adjustable Volume, Sensitivity & Discrimination Controls Audio Detect Options: 1.2'' Speaker or 3.55mm Headphone Port - Locating Sensitivity: Max Depth 8'' Inch 7.8'' inch, Concentric Waterproof Submergible Search Coil - Batteries Required: 6 'AA' (not included)