H171 DuoPro Convertible Voice Tube Headset. For best-in-class versatility, sound quality and comfort, these well designed headsets come in convertible, over-the-head and over-the-ear headset configurations, Quick disconnect headset cord allows you to walk away from the phone without removing the headset Best-in-class comfort, flexibility and conversational clarity: the convertible H171 DuoPro offers both with longwear stability and voice tube microphone.The Headset That Transforms to Suit YouBest-in-Class Comfort and QualityThree way convertible: Over-the-ear, over-the-head, behind-the-head with optional neckband wearing stylesInnovative T-pad headband design, perfect balance in over-the-ear format and soft ear cushion offer all-day comfortVoice tube or noise-canceling microphone optionsPivoting anti-twist microphone for optimal placement and performanceQuick Disconnect feature lets you walk away from your phone while wearing your headset