(over 60 RPM). Resolution: 0.1 RPM(2.5 ~ 999.9 RPM), 1 RPM (over 1,000 RPM). Testing range: 2.5 to 99,999 RPM (rate/min). Test range selection: Automatic. Detecting Distance: 50 to 500 mm. For Marine Boat Yacht Folding Mast Step Stainless Steel Boat Transom Step HOT.
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