Feature: 1. Equipped with CMI/HT8738 chip, delivering a signal-to-noise ratio of 120dB. The PCI interface supports full-duplex playback and recording with 3D spatial positioning audio 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 audio effects. Features 24-bit SPDIF input and output, including optical fiber input and output via daughter card. 4. Compatible with music synthesizers and standard sound cards; supports full-duplex recording and playback. 5. Includes SPDIF digital audio indicator, supports 24-bit stereo recording and playback at 44KHz, delivers high-fidelity audio quality with 120dB dynamic range, and enables dual audio stream playback and 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 Driver CD