Dorie Osborn 2008-7-22 2002-3-2 The most versatile headset ever! The innovative Plantronics DuoPro offers all day comfort and best-in-class sound quality. The H171N is the convertible model with noise-canceling microphone. New ergonomic innovations offer unsurpassed comfort, and the patent-pending anti-twist boom ensures perfect microphone placement. 31329 text/html 1.0 EN H171N DuoPro Convertible Headset with NC text EZ-NetTools EZ-NetTools specializes in providing professional custom web site design and ecommerce services that you can easily maintain.