NIUNIU All Metal DISC Modes All metal mode can identify different types of metals including coins, relics, jewelry, gold, copper, silver, etc; DISC mode discriminates the specific metal being detected. There will be a beep to remind you that the metalis nearby. The closer coil approaches to the target metal, the signal on the meter is stronger. HUMANITY DESIGN ADJUSTABLEDon't worry about the length of the stem, the gold and silver metal detectors from 33-inche to 42-inch adjustable stem, suitable for different height people. With the simple pointer display design, this is an amazingmetal detector for adults and kids. The armrest design helps you to save more effort, more comfortable and less stressful. WATERPROOF ACCURACY The diameter of metal detector search coil is 8 inches. the bigger the search coil is, the higher the sensitivit, . Let you detecting more efficient and time-saving. Waterproof search coil enables you to use detecting to underwater,Perfect for outdoor, like beach, stream, yard. (Note: the control box is not waterproof) Package Includes: 1 x Metal DetectorBattery:*2 Single 9V ( not included) 1 x User Manual