Sigma's USB audio hub
Sigma comes out a special USB hub by adding audio capabilities to the mix. It features three USB 2.0 ports, includes jacks for headphone, speakers, and a microphone, along with a button which you can switch them to headset or speaker. If you want to listen from speaker while listening from head phone just push the button on the top of hub. The hub measure 88×46×17mm weighs 45g and is available end of July for approximately $25. The3 ports USB 2.0 Hub is compatible with OS Windows 98 SE/Me/2000/XP.