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It is built to withstand harsh field environments
which is the first of its kind in metal detectors
Auto ground-tracking reduces noise interference and maximizes target signals
VOLUME CONTROL: Fully adjustable
Fisher Labs Gemini-3 Metal Detector long range It is built to withstandFisher Labs Gemini 3 Metal Detector Two box metal detectors are used by prospectors, geologists, treasure hunters and public utility companies to locate large, deep objects, ore veins, pipes and cables. Fisher Labs, the recognized leader in the field, was granted the first two box metal detector patent in 1938. The GEMINI 3 is respected for being the best there is because it goes deeper, traces farther and is easier to use than any other cache finder