Support AES/EBU, IEC60958, S/PDIF. Really supports 5.1 channel channel. Can be connected to 5.1 speakers Sampling rate up to 48KHz, supports 32KHz/44KHz/48KHz digital recording function The optical fiber output of the sound card only supports the sampling rate of 48KHz, so DTS-CD is 44KH and needs to be converted before listening. Support 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 PC built-in sound card. USB2.0 is backward compatible with USB 1.1; Compatible with audio device specification V1.0; Supports USB full-speed transmission specification up to 12Mbps; Featuring 3 input ports (including 1 optical input), 3 output ports, and 1 optical output port, this USB audio adapter offers a wide range of connectivity options. It allows you to connect your computer to a 5.1 surround sound speaker system using either 3.5mm stereo or RCA connectors, depending on the specifications of your audio equipment. Material: Aluminum alloy colour: silver Package Contents: 1 x USB External Sound card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.