For a failed audio card in a laptop; USB powered adapter requires no external power; Pair with a USB hub or a USB extension cable for a flexible installation; Convenient 3-Pack USB to audio adapter provides a spare to travel with your laptop. Applies to: 3.5mm jacks such as earphones, headphones or microphones The device stops working or the output cuts in. It also applies to computer / laptop / desktop sound card and motherboard connections. You can also use the microphone and headset with your / Mini device. The External USB 2.0 Sound Card Adapter can work with all major operation systems like 98SE/ ME/ 2000/ XP/ Server 2003/ Vista/ 7, Linux, OS, etc. and portable size makes it convenient to take everywhere. Audio adapter with no external drivers required; Plug in the adapter, configure the sound settings on your computer and enjoy; USB powered adapter boosts the signal of your headset, speakers, or microphone. Support 3d sound(Ac-3)and virtual 5.1 sound track,the entertainment for game,dvd music. Colour: random color, don't accept the specified color Material: plastic Size: 51 x 22 x 12mm Package Contents: 3 x USB sound card adapter Only 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.