Feature: 1. With CMI/HT8738 chip, the signal‑to‑noise ratio of the chip reaches 120dB, the PCI interface has full‑duplex playback and recordable 3D spatial positioning sound effects, and supports 3D Direct sound and A3D interface. 2. This sound card is compatible with for Windows 98 / Windows2000 / XP / NT signal voltage (0.5V~5V). 3. This sound card supports 4-channel surround sound output, supports DLS sound library technology, supports A3D 1.0 and DS3D, supports DirectSound 3D and EAX sound effects and also 24-bit SPDIF, OUT and SPDIF at the same time, and the optical fiber input and output through the daughter card. 4. The card is compatible with music synthesizers, traditional sound cards, and supports full-duplex recording and playback. 5. With music-SPDIF digital audio indicator, 24-bit stereo 44KHz sound recording and playback, 120dB complete sound quality and dual playback recording are supported by this card. Specification: Item Type: PCI Sound Card Signal to Noise Ratio: 120dB Support: For Windows 98 / Windows2000 / XP / NT signal voltage (0.5V~5V). Package List: 1 x Sound Card1 x CD