External USB sound card Enjoy true multi-channel audio through a single USB connection. No internal sound card is needed. - USB 2.0 full speed - Compatible with USB audio device class spec. 1.0 and USB HID class spec. 1.1 - 7.1 surround connections (3.5 mm jack) - Support for 2, 4, 6 and 8 speakers - SPDIF optical digital input and output (S/PDIF Input: 44.1/48KHz; S/PDIF Output: 48KHz) - System requirements: USB2.0 port, DirectX 8.1 or higher - Supports Windows 2000/2003/XP/Vista/7/8Inputs: Line-In, S / PDIF, microphone Outputs: Headphone jack S/PDIF Front Surround Center Bass Rear Buttons/controls: Mute Volume Contents in package: 1 x 7.1 Channel USB Sound Box 1 x USB cable 1 x CD with drivers 1 x Manal (eng) For more information see document link (PDF)