Wide applications: This metal detector can be used in the backyard, at shoreline, in the mountains or fields afar to find treasures, let you enjoy the fun of treasure hunting With 11 inch waterproof search coil for cover the maximum amount of ground efficiently and for the deepest ground penetration Intelligent identification of gold, silver, copper and iron,Different metal display with different values and different sounds Discrimination mode: When the detector emits different tones for different types of metals,and when the detector"eliminates" certain metals,we refer to this as the detector"discriminating" among different types of metals. Discrimination is an essential feature of professional metal detectors. Discrimination allows the user to ignore rubbish and other undesirable objects All metal mode: The all metal mode is more sensitive than the discrimination mode, and is used to find all types of metal objects in the ground. The search coil need be in motion for objects to be detected