The new standard in all-day comfort and reliability: SupraPlus expands on the classic corded professional headset style and functionality ò Improved receive-side audio quality: A greater receive-side frequency response improves listening intelligibility. ò Comfortable, lightweight design: Adjustable headband, foam ear cushions and comfort T-Pad design create a stable, comfortable fit. ò Bendable, intelligent, click-stop boom: Stays in position for clearer voice transmission. ò Smaller, lighter, more flexible cable: Designed for lightweight durability, with a new single-cable design for binaural models. ò Quick call feature: Headband twists out of the way for convenient quick call pick up. ò Monaural or Binaural Styles: Monaural lets you hear the conversation and whatÆs going on around you. Binaural cuts out distracting background noises. ò Voice TubeÖand Noise-Canceling Microphones: Voice tubes are lightweight and unobtrusive and noise-canceling microphones allow clear conversations in noisy environments. ò H-Series or PolarisÖ: Models: For compatibility with Plantronics amplifiers, USB-to-headset adapters, headset-ready phones and agent consoles.