Plantronics P51N-U10P Polaris Supra is the popular choice for a lightweight, economical headset with over-the-head design. Monaural Supra has one ear pad which can be easily switched from right to left ear. Plantronics noise-canceling microphone filters out background sounds making it the perfect solution for noisy office environments and busy call centers. Plantronics Quick Disconnect acts as on-hold function if you 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.