METAL DETECTION：The Handheld Metal Detector is designed to accurately locate metal objects (black and non-ferrous metals), which is convenient and practical ALARM MODES：The Metal Detector has sound light and vibration alarm to indicate the metal objects, with 5.9 inch coil, which can easily detect the small metal IP68 WATERPROOF：The Underwater Metal Detector has IP68 waterproof grade, can be cleaned with running water or operated reliably under 30-60 meters of water EASY OPERATION：The detector is equipped with 2 buttons, can be quickly opened and closed, the mode can be switched with one button, convenient for control Accurate detection: This underwater metal detector can accurately locate black and non-ferrous metal objects, helping you easily discover targets in treasure hunting activities