Title: best headset!
Product review: I compared this with the Plantronics Voyager 520, and I really believe this 'older' model is better than the 520 in terms of comfort and features. If for nothing else, think about this--with the 510, if that blue flashing LED is annoying at night, you can disable it. With the 520 (as I believe with most other headsets), you're stuck being blinded.
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