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Calibration is the most important step for accuracy. You must recalibrate every time you change modes or move to a new wall section. Go to product viewer dialog for this item. Vevor Stud Finder Wall Scanner
: Use a fresh 9V alkaline battery for consistent performance. pittsburgh 5 in 1 stud finder instructions
: Cycle through the five modes (often using a button on the side or the main power button) to choose the depth or material: Calibration is the most important step for accuracy