Manhattan, 7-Channel PCI Sound Card Easily installs in desktop computers to provide an enhanced 7.1-channel surround sound experience Built-in, 32 Ohm earphone buffer ideal for headphones Supports Dolby Digital EX, DTS ES, HRTF 3D positional audio, DirectMusic, DirectSound 3D and A3D interfaces Full duplex 96 kHz / 24-bit playback and 48 kHz / 16-bit recording Plug and Play, Windows compatible