5.1 Channel PCI Sound Card Chipset: C-Media CMI8738 Features: Full-duplex playback and recording. Built-in 16-bit CODEC HRTF 3D positional audio, supporting both DirectSound 3D® & A3D® interface. Also support earphones, 2/4/6 channel speaker mode Built-in 32 OHM Earphone buffer Downloadable Wave Table Synthesizer, supporting Direct Music® PCI Rev. 2.2 compliant with bus mastering modes ACPI compliant power down management Support Windows® 2000, XP/Vista Package Content: 1 X PCI Sound Card 1 X User manual 1 X Driver CD (Note : Photo attached is for reference only, it may be slightly varied in items of colour, shape from the actual item delivered from time to time) More Sound cards : CPE-3A62, CP-1A61, CP-1A41