Features Supports AES/EBU, IEC60958, S/PDIF Truly supports 5.1 and 7.1 channels. Connectable to 5.1 speakers. Up to 48kHz sampling rate, supports 32kHz/44kHz/48kHz digital recording. The sound card's fiber output only supports a 48kHz sampling rate; DTS-CD is 44kHz and requires conversion to listen. Supports Win98/ME/2000/XP/VISTA/WIN7/WIN8/MAC OS9.1 (only 2 channels usable on MAC) Full-duplex audio stream playback and recording without needing a built-in PC sound card. USB 2.0 backward compatible with USB 1.1 Compatible with audio device specification V1.0 Supports USB full-speed transfer specifications up to 12Mbps 3 input terminals (including one fiber optic input) 3 output terminals and 1 fiber optic output terminal Output: 5.1 channels + fiber SPDIF Composition: PC + sound card + amplifier and 5.1 speakers Applicable to: HTPC home theaters and users with high audio quality demands (watching movies/gaming/karaoke), can be connected to regular headphones for voice chat and online karaoke. Other: Enjoy true AC-3 or DTS surround sound effects in your digital home theater or connect directly to a 5.1 active speaker. Package Includes 1 * Sound Card