New Metal Detector The Discriminator II Features: Features three (3) distinctive alerts for different types of metal. Ferrous/Non-Ferrous discriminator distinguishes iron/steel from silver/gold. One-Touch auto-tune and very low frequency design for accurate detection. 200mm waterproof search coil. Ground control tunes out false signals in areas with profuse minerals. View meter and pointer with ferrous and non-ferrous indicator lights. Adjustable metal shaft and arm-supporting handle for comfortable use. Contains battery test switch and 1/8" headphone jack. Requires three (2) 9-Volt batteries (not included).