This sound card adopts /HT8738 chip Supports 4-channel surround sound output, supports DLS sound library technology, supports A3D 1.0 and DS3D, and is compatible with DirectSound 3D and EAX sound effects. Supports 24-bit SPDIF, OUT and SPDIF IN at the same time, and also supports optical fiber input and output through daughter cards The chip's signal-to-noise ratio reaches 120dB, PCI plug and play bus interface - full duplex playback and recording - HRTF 3D spatial positioning sound effect, support DircetSound 3D and A3D interface Wide range of operating system platforms, support MSDOS, WINDOWS3X, 9X, NT, WIN2000, LINUX and other platforms - MPU-401 GAME/MIDI port and surround sound SB 16 support - Downloadable wavetable synthesizer Support Direct Music - SPDIF digital sound indicators: 24-bit stereo, 44KHz sound sampling recording and playback 120dB sound quality full duplex playback recording Automatic detection of SPDIF /IN CRL 3D sound technology Supports 3D interface for D3D and Aureatr Support 2/4 speakers and DLS Support wave table music synthesizer Compatible with traditional sound cards Full duplex playback and recording Support Windows 98/ Windows2000/XP/NT signal voltage (0.5V-5V) Colour:Photo Color Material:ABS Package Contents: 1 x Sound Card 1 x Optical Disc Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.