The Premiere Edition Underwater Metal Detector is 100% submersible working in 32.8 feet/10 meters of fresh and salt water. This metal detector features two operation modes, one which detects any type of metal and the other which has the capability to distinguish differing metals. Other features include a 10 extendable search coil, adjustable knobs for sensitivity, discrimination sensitivity, volume controls for headphones (included) and a low battery indicator. An LED light flashes red when a target is detected and a distinct audio tone will sound, depending on what has been detected. A padded armrest offers hours of comfortable detecting and a rubberized handgrip for a sure hold. Operates on (8) AA alkaline batteries (not included).