The Garrett AT MAX Metal Detector is designed for dusty, humid or wet environments and is fully waterproof to 10 feet. Sync to Garrett's MS-3 wireless headphones that are included with the AT MAX. Enhanced electronics, a 13.6 kHz operating frequency, and eight Sensitivity/Depth adjustments allow you to detect targets deeper than other Garrett AT detectors. The AT MAX includes a backlit display feature, allowing you to continue hunting in low-light conditions. Iron Audio allows you to hear discriminated iron (normally silenced) to avoid digging undesired flat iron targets such as bottle caps or washers. FeaturesTRUE ALL METAL MODE - Detects all types of metal and provides the greatest possible detection depth and sensitivity.ALL METAL IRON AUDIO - Garrett exclusive feature that audibly identifies discriminated iron while operating in a True All-Metal Mode (also available in the three Discrim Modes).DIGITAL TARGET ID - Numeric identification scale from 0 to 99. Identifies a targ...