Garrett AT Gold Metal Detector Treasure Hunting Package Pro Mode Audio: Proportional Audio and Tone Roll Audio features allow the user to hear characteristics of a target as they would in a True All-Metal Mode. High-Res Iron Discrimination: Use touchpads to set iron discrimination in one of 40 levels for precise ability to separate good targets from trash. Digital Target ID: 0 to 99 Target ID scale offers increased ability to distinguish one targets conductivity from another. Iron Audio: Allows the user to hear discriminated iron and to alter the detectors mid-tone signals range Fast Recovery Speed: Allows greater ability to pick out good targets amongst trash All Terrain Versatility: Weatherproof housing designed for dusty, humid or wet environments; unit can be submerged to a maximum 10-foot depth. 18 kHz frequency: improved detection of small targets, gold nuggets, jewelry Ground Balance: automatic and manually adjustable for improved performance Graphic Target Analyzer (GTA): identifies targets conductivity Continuous Coin Depth Indicator: to determine target depth