Professional metal detector with innovative Z-Lynk wireless technology. When combined with the MS-3 wireless headphones, you will no longer have issues with headphone cables. The AT MAX is suitable for any terrain and can search for coins, antique objects, treasure chests, and jewelry, as well as gold nuggets and much more. The all-metal mode detects all metals and offers maximum detection depth and sensitivity. The operating frequency of the AT Max at 13.6 kHz provides excellent detection of a variety of targets, including silver coins, gold, jewelry, and brass. It can be adjusted automatically and manually for enhanced performance. It includes 175 resolution points for ground balance, allowing the AT Max to search both conductive soils like saltwater beaches and highly mineralized grounds. The Garrett Exclusive feature simultaneously sets the ground balance to a value range to manage localized ground changes. By reducing subtle ground resonances, the automatic ground balance window smooths the detector's audio signal, enabling the operator to hear faint targets. Proportional PWM audio resonance and tone roll audio provide more information about the target object and sharp, responsive target signals. Fully submersible up to 3 meters deep. The weatherproof design also protects against dusty and humid environments.