Main controller: CM8828 + CM9882A Bus type: PCI Express 1.1 Audio channel: 7.1 CH audio system, compatible with 2.1 / 5.1 stereo surround sound system equipment Interface interface LINE: linear input, MIC: microphone input, FRONT: pre-output,REAR: Rear surround output, C/SUB: Center/Subwoofer output, SIDE: Side surround output Functional characteristics Rich input/output interface ASIO driver and advanced intelligent software interface onboard high fidelity audio (HDA) output (F_Audio) Embedded mode: Embedded 8051-based MCU that transcodes HD Audio commands Application areas: home theater, large 3D games, audio playback, etc. Sample sampling rate: 44.1 ~ 192 kHz / 24 bits Signal to noise ratio: 100db Harmonic distortion: -85db playback / -90db recording Control interface: Xear intelligent software exchange control interface Working mode: extended full duplex (simultaneous playback and recording function) Audio mode XearTMLiving 1.1, XearTMVoClear, XearTM Sonic, XearTM Surround, XearTM Pro 1.0, XearTM SingFX, XearTM Magic Voice, XearTM Audio Brilliant colour:black Material:Metal + plastic Package Contents: 1 x CM8828 PCIe7.1-CH sound card (standard long iron plate) 1 x CD-driver 1 x User's Manual 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.