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Title: worked for a couple hours
Review: brought this along for a vacation up north. I used it in part of the lake where I knew the depth and it certainly has a little error. However that was understandable. What was not understandable was it's non intuitive buttons and the fact that stopped working after one outing. The screen just went black and the item just stopped working. Changing the batteries didn't help. I requested a refund rather than an exchange.
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