Features: 100% brand new and high quality 5.1-channel sound card Built-in external built Applicable to the field of home 24 bit sample median The type of PCI bus interface Own interface front-channel output, in the home / bass channel output, Rear channel output, surround sound output, microphone input, line transmission Income, headphone output Operation System:WIN2000/XP/VISTA/WIN 7/WIN 8/WIN 10/linux Specifications: Chipset: CMI8738-6CH System interface: 32-bit PCI express x1 Bus Master Customize Internet audio with the power and surround sound of EAX audio technology HRTF-base 3D positional audio, supporting DirectSound 3D, EAX and A3D interfaces Supports EAX, karaoke key, and Echo sound effects Complies with Microsoft PC99 specification Wave table synthesizer: DLS-base Wavetable music synthesizer Software compatibility: fully Sound Blaster, Sound Blaster Pro and DirectSound compatible External connector: SPK1,SPK2,SPK3, line-in, MIC-in Internal connector: CD audio, AUX connectors 3D effect: Microsoft Direct Sound 3D; Aureal A3D; HRTF 3D extension positional audio; EAX Size: approx. 12cm x 9.5cm / 4.7 x 3.7inch (Optional) Shorter Barrier Length: 8cm / 3.15inch Package includes: Package 1# : 1 x PCI-E Audio Digital Sound Card Package 2# : 1 x PCI-E Audio Digital Sound Card + 1 x Shorter Barrier