Working with the latest in Wideband VoIP Technology, the Plantronics SupraPlus Wideband headset range delivers the highest level of audio performance. SupraPlus Wideband headsets are designed to be used with the new generation of wideband-enabled IP keysets and softphones for superior audio quality, speech clarity and life-like fidelity. Users will experience greater satisfaction through enhanced intelligibility and reduced mis-communication. Designed for over-the-head comfort, the SupraPlus Wideband Headset allows users to choose between experiencing total-focus sound reduction (Binaural design). Should the receiving phone not be wideband-enabled, then the sound will default to lesser quality narrow-band speech.