This external USB audio card supports 7.1/5.1 channels and SPDIF optical output, ideal for PC and computer devices. - Supports AES/EBU, IEC60958, S/PDIF - Truly supports 5.1/7.1 channels, compatible with 5.1 speakers - Up to 48KHz sampling rate, supports 32KHz/44KHz/48KHz digital recording - Note: Fiber output only supports 48KHz; DTS-CD (44KHz) needs conversion for playback - Compatible with Win98/ME/2000/XP/VISTA/WIN7/WIN8; MAC OS9.1 (only 2 channels available) - Full duplex audio playback/recording, no built-in PC sound card needed - USB 2.0 backward compatible with USB 1.1, full speed (up to 12Mbps) - 3 input terminals (1 fiber optic input), 3 output terminals + 1 SPDIF optical output - Output: 5.1 channels + fiber SPDIF - Applicable to HTPC home theaters, movie watching, games, karaoke; works with regular earphones for voice chat/online karaoke - Enjoy real AC-3/DTS surround sound with digital home theater or connect to 5.1 active speakers Packaging includes: 1 x Sound card Color: As shown in the picture