Feature: 1. Equipped with CMI/HT8738 chip, the signal-to-noise ratio reaches 120dB. The PCI interface supports full-duplex playback and recording with 3D spatial positioning o effects. Compatible with 3D Direct Sound and A3D interface. 2. Compatible with Windows 98, Windows 2000, XP, and NT operating systems. 3. Supports 4-channel surround sound output, DLS sound bank technology, A3D 1.0, DS3D, DirectSound 3D, and EAX o effects. Features 24-bit SPDIF out and SPDIF in simultaneously via daughter card, including optical input and output. 4. Compatible with MIDI synthesizers and standard sound cards. Supports full-duplex recording and playback. 5. Includes music-SPDIF digital o indicator. Supports 24-bit stereo 44KHz o recording and playback, 120dB signal-to-noise ratio, and dual playback recording. Specification: Item Type: PCI Sound Card Signal to Noise Ratio: 120dB Compatibility: Windows 98, Windows 2000, XP, NT Package List: 1 x Sound Card 1 x CD