Add hi-fi digital optical 7.1 surround sound to your computer through PCIe 7.1 Channel PCIe Sound Card 24-bit 192KHz PCIe 7.1 Surround Sound Card PC Audio Adapter Card Supports optical or analog audio devices through SPDIF or 3.5mm jacks All ports fit in standard or small form-factor computers (low-profile bracket included) using the main card plus header bracket Stereo microphone line and SPDIF input Build a home theater PC or turn your existing desktop into a media center