1. 5.1 Channel: This USB sound card adds up to 5.1 channels of audio through a single USB port to your computer, supports 5.1 and 2 channel output.2. Multiple Interface: This external sound card has Mic IN, Spdif IN, Spdif Out, Line IN, Front Out, Rear Out, Cen/Bass Out, USB IN.3. PC Sound Upgrade: This 5.1 sound card's support for analog and digital audio output for stereo to 5.1 channel audio applications, upgrades the existing integrated audio on a desktop or laptop computer.4. 48kHz Sampling Rate: This USB audio adapter supports 48kHz sampling rate for analog playback and recording.5. Easy Installation: This 5.1 channel audio adapter can be easily installed, suitable for Win XP, for Vista and for Win 7.Spec:Item Type: USB Sound CardMaterial: Aluminium AlloyCompatibility: Compatible with SES/EBU, IEC60958, S/PDIF Formats for Stereo PCM AudioSampling Rate: 48kHz Fixed Sampling RateAnalog Recording Function: SupportedSCMS Copy Protection: SupportedOperating System: Suitable Win XP, for Vista and for Win 7Function: Support Full Duplex Play/Audio Stream Recording on PCData Speed: Compatible with Usb Full Speed 12Mbit Serial Data TransmissionInput Terminals: 3Output Terminals: 35.1 Channel Play Multi Channel Audio Code Interface: SupportedTraditional 2 Channel Audio Source Play: SupportedHow to Use:Plug and play after installation of driversPackageList:1 xUSB Sound Card1 x CD1 x USB Cable