The AT MAX is the most powerful all-terrain VLF detector from Garrett. It includes built-in Z-Lynk wireless technology, advanced ground balance options, a true all-metal mode, adjustable threshold, all metal iron audio, a backlight for low-light situations and much more. The AT MAX is fully submersible to 10 feet. It is shipped with Garrett’s MS-3 Z-Lynk wireless headphones, offering high-fidelity audio and volume control for clear signals on all your land targets. Enhanced electronics provide a 13.6 kHz operating frequency and 8 sensitivity/depth adjustments allowing the user to detect a wide range of targets, including silver coins, gold jewelry and brass relics, at impressive depths.