Agiler USB External Sound Card is ideal for laptops or small computers without expansion slots. Thanks to its optical audio port, this device is even capable of delivering 5.1 stereo surround sound. Upgrade your computer with 3D stereo sound with this 5.1-Ch USB Sound Card. This 5.1 Channel USB 2.0 External Sound Adapter features USB 2.0 interface eliminating the need for a traditional sound card. You just need to plug this device into a USB port on your laptop or desktop and enjoy 3D sound for all your games, movies and other media content.