Title: 2 bad out of the box
Review: I purchased a model 655 headset. It worked for about 20 minutes and then failed. I returned it to Amazon for a replacement and the second unit also failed within an hour.Amazon was easy to deal with for the return but I think Plantronics has a problem at least with the batch mine came from.I subsequently got a Plantronics 510 discovery unit which works fine.
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