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PRO-ARC FISHER Fisher PRO-ARC is a metal detector designed for use by professional archaeologists, suitable for searching for coins and "wrecks" but also small gold objects. The PRO-ARC is able to detect objects or coins of medium size up to 40 cm. The Fisher PRO-ARC is a metal detector equipped with a large digital display, which provides numerous information on the type of metal detected, via the menu, you can change various parameters, such as sensitivity, audio threshold, hue and discrimination.