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Title: Not really a 510
Review: I ordered this 510 model but received a 530. The 510 is no longer available and the 530 is the newer version that this seller is sending in its place. It was quiet on the lowest setting but deafening on the middle and high setting. They look the same however the 530 is not the quality that earned the 510 those great reviews. I returned it and received a refund however I never would have placed the order and had to go through the hassle if I knew which item they were really selling.
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