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Title: Two of three don't work
Review: I ordered two: one worked, one gave totally random readings.I sent the bad one back, and now the replacement is also inconsistent. It's going back for a refund.These are cheap, and I guess I won't have wasted any money because I'm sending the bad ones back, but even if they were free they wouldn't be worth the aggravation of figuring out they don't work and sending them back.
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