Plantronics DA45 Audio Adapter Cable USB To Quick Disconnect 77559-42 Optimized for PC-based voice communications Ergonomic design with inline volume, mute, and answer/end for call control Quick Disconnect capability allows the headset to detach without losing the call Wideband audio support and echo suppression for enhanced Internet call quality Plug-and-play USB connectivity for fast, simple setup General Manufacturer's Code: 77559-42 Device Type: Adapter Cable Form Factor: External Interface Type: USB Audio Output Sound Output Mode: Stereo Hardware Controls And Indicators: Volume control, mute button, answer/end Connectivity Interfaces: 1 x USB - 4 pin USB Type A , 1 x headset - 6 pin Quick Disconnect Miscellaneous Cables Included: 1 x USB cable