The sensitive, high 10kHz frequency of Garretts Ace 400 Metal Detector makes quick work of locating jewelry and relics made of materials like lead and gold so you can get to work bringing them to the earths surface. 8.5 x 11 concentric search coil delivers enhanced coverage and detection depth, while Frequency Adjust allows you to toggle between various frequencies and eliminate interferences for clear readings every time. High-resolution Iron Discrimination allows you to choose from one of 40 levels of iron discrimination in order to distinguish between trash and valuables with a single glance. Target ID legend provides identification of individual targets on your LCD screen. Improved audio for clearer target ID tone signals. Includes a 8.5 x 11 search coil cover, volume-control ClearSound easy-to-stow headphones and ACE environmental cover that protects the box against dust, rain, mud and more. Made in USA. Batteries: 4 AA (included). Application: jewelry, relic, coin. Length: 42 to 51. Search coil: 8.5 x 11 DD PROformance. Frequency: 10kHz. Wt: 2.9 lbs. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Color: Clear. Type: Metal Detectors.