Plantronics P91-U10P Polaris Encore Monaural Headset offers top-of-the-line sound quality in a headband design. This lightweight headset is a favorite for all-day comfort. Monaural Encore headsets have one ear pad which can be easily switched from right to left ear. Voice tube microphone assures world-class sound quality. Plantronics Quick Disconnect acts as an on-hold function, allowing you to walk away from your phone while still wearing your headset.