Features: 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. specification:Item Type: USB Sound Card Material: Aluminium Alloy Compatibility: Compatible with SES/EBU, IEC60958, S/PDIF Formats for Stereo PCM Audio Sampling Rate: 48kHz Fixed Sampling Rate Analog Recording Function: Supported SCMS Copy Protection: Supported Operating System: Suitable Win XP, for Vista and for Win 7 Function: Support Full Duplex Play/Audio Stream Recording on PC Data Speed: Compatible with Usb Full Speed 12Mbit Serial Data Transmission Input Terminals: 3 Output Terminals: 3 5.1 Channel Play Multi Channel Audio Code Interface: Supported Traditional 2 Channel Audio Source Play: Supported PackageList:1 x USBSoundCard 1 x CD 1 x USB Cable