I have four of these still in the boxes. Purchased for our buisness and ended up not needing them. $30 EACH They work with Cisco VOIP phone systems (and some others) ! Noise Canceling Microphone. Unique anti-twist boom ensures microphone stays properly positioned. Quick release feature so you can disconnect the headset and get up if needed. Product Description Superior sound quality and breakthrough ergonomics make these headsets best in class. Innovatively designed in over-the-head, over-the-ear and convertible configurations, the Plantronics DuoPro headsets offer all-day comfort and best-in-class audio performance. The breakthrough double T-pad headband and ergonomic ear loop mean there's never a speaker pad pressing on your ear. Never again will you experience voice fade from an improperly placed microphone. DuoPro headsets feature advanced speaker technology for optimal voice clarity. Stylish, lightweight and durable enough for everyday wear. They retail for about $90 each. $30 EACH If interested, please call 503/233-9899 Location: Tigard, OR it's NOT ok to contact this poster with services or other commercial interests oregon