I have two of the scottys for my lake boat. They work fine. About 50 feet is their limit (I think they have 100 feet on them but who needs that much for most lake rainbows). The counters begin to lose accruacy after awhile but generally one turn equals one foot.
For $60 well worth the money IMHO.
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Mike, Editor
www.washingtonlakes.com "Featuring readers lake and saltwater reports."