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 audio effects. Compatible with 3D Direct Sound and A3D interface. 2. This sound card is compatible with Windows 98, Windows 2000, XP, and NT systems within the specified signal voltage range (0.5V~5V). 3. Supports 4-channel surround sound output, DLS sound bank technology, A3D 1.0, DS3D, DirectSound 3D, and EAX audio effects. Also supports 24-bit SPDIF IN and SPDIF OUT simultaneously, with optical input and output via daughter card. 4. Compatible with MIDI synthesizers and standard sound cards. Supports full-duplex recording and playback. 5. Includes SPDIF digital audio indicator. Supports 24-bit stereo 44KHz audio recording and playback, delivering high-fidelity sound quality with 120dB dynamic range and dual playback recording capability. Specification: Item Type: PCI Sound Card Signal to Noise Ratio: 120dB Compatibility: Windows 98 / Windows 2000 / XP / NT (signal voltage 0.5V~5V) Package List: 1 x Sound Card 1 x Driver CD