function Support AES or EBU, IEC60958, S or PDIF Truly support 5.1 channels and 7.1 channels. Can be connected to 5.1 speakers Up to 48KHz sampling rate, support 32KHz or 44KHz or 48KHz digital recording function. The fiber output of the sound card only supports 48KHz sampling rate, so DTS-CD is 44KH and needs 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 on MAC) Full duplex audio stream playback and recording without built-in PC sound card USB 2.0 is compatible with USB 1.1 Compatible with audio device specification V1.0 Support full speed USB transmission specifications up to 12Mbps 3 input terminals (from one of which is optical fiber input) 3 output terminals and 1 optical fiber output terminal Output: 5.1 channelsandfiber SPDIF Composition: PC andsound cardandamplifier and 5.1 speaker Applicable: HTPC for home theaters and friends with high audio quality requirements (such as watching movies or games or karaoke), can be connected to regular headphones for voice chat and for online karaoke. Other: Enjoy real AC-3 or DTS surround sound effects in your digital home theater or connect directly to a 5.1 powered speaker. The package includes 1 x sound card VAT payers - individuals and legal entities will not be able to use gift cards when purchasing this product. < or p >