UC Voice 750 Monaural Over-the-Head Headset Dark Color UC Voiceâ ¢ 750 headsets are designed specifically for Unified Communication environments. The headsets are ideal for office professionals who often use UC voice and softphone applications. Their lightweight designs ensure maximum comfort all day long. The headsets feature superior sound clarity for softphone calls conference calls live presentations and other multimedia applications. The noise-canceling microphone ensures that the recipient cannot hear background noise from the speakers surroundings making them ideal for noisy environments. Headset Type: Monaural; Headset Style: Over The Head; Earpiece Type: Ear Cushions; Earpiece Material: Leatherette.