1 USB 2 0 3-Port Hub with Stereo Sound Adapter Combo is designed especially for laptops, tablets, and ultrabooks and expands one USB 2 0 high-speed port into three easily 2 It is also a highly flexible audio interface, which can be used with either laptop or desktop system; Simply Plug the Sound Adapter into your USB port, and then plug your headphones into the Adapter 3 Feature of Stereo Sound Adapter4 3D stereo USB audio adapter5 Backward compatible with USB 1 1 /2 0 - Connectors: USB type A, stereo output jack, microphone input jackNo external power requiredPlug & Play, no drivers neededInput: USB2 0Output: 3-ports USB2 0, CTIA OMTP Audio jacks, Micphone jack Sound Card: 7 1 ChannelAudio OFF/ON switchcolour:BlackMaterial:PC+ metalsize:The size: Approx 90 x 31 x 11mmThe cable length: Approx 45cmPackage Contents:2 x USB2 0 Hub with Stereo External Sound CardOnly the above package content, other products are not included Note: Light and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm