Plantronics P171N-U10P Polaris DuoPro Convertible Headset is the best-in-class convertible headset for maximum comfort and versatility. Wear it over-the-ear for sleek styling or over-the-head for stabilty. Innovative design allows monaural ear pad to "float" over the ear for all day comfort; anti-twist boom ensures perfect placement; noise-canceling microphone for noisy offices. Plantronics Quick Disconnect acts as an on-hold function, allowing you to walk away from your phone while still wearing your headset. Comes complete with Polaris cable (Quick Disconnect to modular plug) that connects headset directly to your Polaris-compatible phone.