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Title: Think Before You Buy
Review: If you can't abide an ever-present low hiss in the background, and louder interference in the presence of power lines, don't buy this product. I wish I'd read the reviews more carefully before I bought. A number of even the most favorable ones mentioned this annoyance.The manufacturer replaced the first unit after I complained, but it was no improvement. This may be the best product of its type out there, but it still comes up short.
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