The SupraPlus Wideband Headset is designed to work with the new generation of wideband-enabled IP hardphones and softphones for superior audio quality and natural-sounding conversations. Included PerSonoPro Software ensures full integration with a wide range of enterprise-grade soft-phones. It offers all of the features of the SupraPlus, including outstanding reliability and comfort, robust construction and stylish design. This is the ultimate headset for office professionals who increasingly use the Internet for phone-calls via an IP softphone or hardphone. The DA45 adapter provides a full set of easy in-line phone controls including call answer and end, volume and mute.