PCI-E Sound Card, 5.1 Channel 3D Audio Card with Headphone Amp by Zip Technology (Driver and Instructions Included) Enjoy Cinematic Sound On Multiple Speakers! Provides audio fidelity that rivals movie theaters with 4/6 channel digital sound 32-bit PCI Express Bus Master, PCI 12.1 and PCI 12.2 compliant HRTF-base 3D positional audio, supporting DirectSound 3D, EAX and A3D interfaces Supports EAX, Karaoke key, Echo sound effects, and multi-speaker output to 2/2.1/4/4.1ws Compatible with Windows and Linux Operating Systems