The Sharp Edition Metal Detector features two operation modes, one which detects any type of metal and the other which has the capability to distinguish differing metals. There are also adjustable knobs for general sensitivity, discrimination sensitivity, a low battery indicator, and volume controls for speakers or headphones (not included). The 8.5-Inch waterproof search coil allows you to search in shallow water. Detection results are displayed on an easy to read LCD display screen that gives a visual indication of what has been found and depth of target. Operates on (8) AA alkaline batteries (not included). Protected by a One Year Limited Warranty.