LogiLink® USB Sound Box 7.1 8-Channel External sound processor Computer Connection: USB 2.0 Port Built-in 7.1 Channel Surround encoder Supports 2, 4, 6 and 8 speakers Modes: 2.0, 2.1, 5.1, 7.1 Simultaneous recording and playback Inputs: Line-In, S / PDIF, microphone Outputs: Headphone, S / PDIF Front, Surround, Center, Bass, Rear Function keys: Mute, Volume With the USB sound box 7.1 from LogiLink® you extends your computer to a high-end sound card. Just connect it with the USB 2.0 port of your computer. There are multiple connectivity options available for headphones, headsets and speaker systems up to 7.1 channel can be connected. The sound processor also enables simultaneous recording and playback.