Features: Supports AES/EBU, IEC60958, S/PDIF True 5.1 and 7.1 channel support. Connectable to 5.1 speakers. Up to 48 kHz sampling rate, supports 32 kHz/44 kHz/48 kHz digital recording. The sound card's fiber optic output only supports a 48 kHz sampling rate; DTS-CD is 44 kHz 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 streaming 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 12 Mbps. 3 input terminals (one of which is a 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. Suitable for: Home theater HTPCs and users with high audio quality demands (like watching movies/gaming/karaoke). Connectable to standard 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 system. Package Includes: 1 * Sound Card