Enhance your treasure hunting with the Garret AT Max, designed for detecting metal both in the ground and below the water. The metal detector has a weatherproof design that protects it from humidity and dust. When operating underwater, it uses wired headphones and a submersible search coil that is waterproof up to 10 feet. The detector can be used in both fresh and salty water without negative effects. It has a battery condition indicator to alert you on the level of battery charge.