Additional Details ------------------------------ Product description: The Fisher Gold Bug, the predecessor to the Gold Bug-2, was designed and engineered by Fisher engineers from the ground up for the sole purpose of finding deep, small and large gold nuggets in highly mineralized soil. Almost overnight, the Gold Bug became the standard against which all other gold-hunting detectors were compared. The next generation Gold Bug, the Gold Bug-2, is not meant to be a replacement for the original Gold Bug. Your Gold Bug-2 offers many of the successful features of the Gold Bug as well as some new features, making it a distinctly different detector, but still designed for the sole purpose of finding gold nuggets. The first and foremost of these new features is the operating frequency of the Gold Bug-2 (71 kHz). This ultra-high operating frequency is extremely sensitive to small gold nuggets and it also offers a side benefit. Because the Gold Bug-2 operates at a different frequency, it can be operated near an original Gold Bug without interference. Also, a new mineralization switch on the Gold Bug-2 can be set for high, normal and low mineralization ground conditions. When set for high mineralization, this new circuitry allows prospectors to hunt in areas previously off-limits due to high ground mineralization or numerous hot rocks. Although the original Gold Bug is known for finding small nuggets in highly mineralized soil, the Gold Bug-2 will set new standards for both size and depth under many soil conditions. Iron discrimination is another new feature. In the IRON DISC Mode, you can identify hot rocks and small trash items like iron nails and other ferrous trash before digging them. Use this mode in extremely trashy areas to check a target for its iron content. Material: Metal