feature Supports AES or EBU, IEC60958, S or PDIF Truly supports 5.1 channels and 7.1 channels. Can connect to 5.1 speakers Up to 48KHz sampling rate, supporting 32KHz or 44KHz or 48KHz digital recording function The sound card fiber output only supports a sampling rate of 48KHz, so DTS-CD is 44KH and requires conversion to listen Support Win98 or ME or 2000 or XP or VISTA or WIN7 or WIN8 or MAC OS9.1 (only 2 channels can be used in MAC) Playback and recording of full duplex audio streams without the need for a built-in PC sound card USB 2.0 is backward compatible with USB 1.1 Compatible with audio device specification V1.0 Supports USB full speed transmission specifications up to 12Mbps 3 input terminals (one of which is a fiber optic input) 3 output terminals and 1 fiber optic output terminal Output: 5.1 channelsandfiber SPDIF Composition: PCandsound cardandamplifier and 5.1 speaker Applicable to: HTPC home theaters and friends with high audio quality requirements (such as watching movies or games or karaoke), can be plugged into regular earphones for voice chat and online karaoke. Other: Enjoy real AC-3 or DTS surround sound effects in your digital home theater or connect directly to a 5.1 active speaker. Packaging includes 1 x Sound card Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.