USB 5.1 sound card uses fiber market CM6206 high-end chips, particularly OK mixer functions. perfect for home theater (such as watching / games .) use, plug an ordinary headset voice chat. Often suitable for HTPC home theater (such as watching / games .) the commission can be inserted ordinary headset voice chat. Recording and playback of full-duplex audio stream without sound card built-in PC. Support / , IEC60958, S / PDIF, really support 5.1, 7.1. 5.1 speakers can be connected; high sampling rate of 48KHz, supports 32KHz / 44KHz / 48KHz digital recording function; sound card supports only 48KHz using optical output rate, MIC IN = input microphone: the microphone plug LINE IN = input line: the MP3 audio input to the sound card or the like, into the whole on a PC with FRONI OUT = Front Output: plug headphones or speakers for 2-channel / 4-channel interpolation or more preamp REAR OUT = rear output: Open Channel 4 or more to sound / rear speakers interposed CEN / RASS OUT = mid / bass output: 5.1 speaker dedicated interface SPDIF IN = input fiber: optical audio input to the sound card, Synthesis in the computer SPDIF OUT = optical output: - as the output (digital signal) on the optical fiber amplifier or a decoder Support / , IEC60958, S / PDIF Support Win98 / ME / 2000 / XP / VISTA / WIN7 / WIN8 / OS9.1 ( can only use 2-channel) USB2.0 backwards compatible with USB 1.1 Compatible audio device specification V1.0 Support USB full-speed fer up to 12Mbps specification Three input terminals (input optical fiber wherein a) Three output terminals and an output terminal of the optical fiber Colour:Blue Material:metal Size:9*6.5*1.8cm Package Contents: 1 * Optical fiber sound card 1 * data cable 1 * CD Only the above package content, other products are not included. Note: Light 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.