DESC: The Plantronics DuoPro offers unmatched versatility, as it is configurable for the specific needs and tastes of each user. This over-the-ear variant offers all day comfort and excellent sound quality. The noise-cancelling microphone includes a patent-pending anti-twist boom for perfect placement every time, which means no more 'voice fade' and lost callers. The DuoPro features advanced speaker technology for optimal voice clarity, so if you are looking for extra productivity, comfort and style in one neat package, the DuoPro is the answer for crisp and clear conversations through the day.