Feature:1. This sound card uses CMI/HT8738 chip. The chips signal-to-noise ratio reaches 120dB, PCI plug-and-play interface-full duplex playback and recording-HRTF 3D spatial positioning sound effects, supports dircet sound 3D and A3D interfaces.2. Support for 98 / for Windows2000 / XP / NT signal voltage (0.5V 5V).3. Support 4-channel surround sound output, support DLS sound library technology, support A3D 1.0 and DS3D, compatible with DirectSound 3D and EAX sound effects. Supports 24-bit SPDIF, OUT and SPDIF IN at the same time, and supports optical fiber input and output through a card.4. This card supports music synthesizer, traditional sound card, and supportsfull duplex playback and recording.5. Support Direct Music -SPDIF digital audio indicators: 24-bit stereo, 44KHzsound sampling recording and playback, 120dB sound quality full duplex playback recording.Specification:Item Type: Sound cardSignal-to-Noise Ratio: 120dBSupport: ForWindows 98 / for Windows2000 / XP / NT signal voltage (0.5V 5V)Package List:1 xSound Card1 x Optical Disc