U-Mest&reg; PCI Express 5.1 PC Sound Card 6 Channel Surround 3D Audio CMI8738 Support high-performance 6-channel audio sound card 24 bit sample median The type of PCI bus interface6-channel sound card Built-in external built Applicable to the field of home 4-channel sound card Built-in external built Applicable to the field of home4-channel sound card Built-in external built Applicable to the field of home. Own interface front-channel output, in the home / bass channel output, Rear channel output, surround sound output, microphone input, line transmission Income, headphone output Safety & Emission: FCC, CE Operation; System:WIN2000/XP/VISTA/win7/WIN8/linux 3D effect: Microsoft DirectSound 3D; Aureal A3D; HRTF 3D extension positional audio; EAX