featureSupports AES/EBU, IEC60958, S/PDIFTruly supports 5.1 channels and 7.1 channels. Can connect to 5.1 speakersUp to 48KHz sampling rate, supporting 32KHz/44KHz/48KHz digital recording functionThe sound card fiber output only supports a sampling rate of 48KHz, so DTS-CD is 44KH and requires conversion to listenSupport Win98/ME/2000/XP/VISTA/WIN7/WIN8/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 cardUSB 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 channels+fiber SPDIFComposition: PC+sound card+amplifier and 5.1 speakerApplicable to: HTPC home theaters and friends with high audio quality requirements (such as watching movies/games/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 includes1 * 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.