This external USB sound card provides 7.1 and 5.1 channel audio output with an SPDIF optical connection. It supports AES/EBU, IEC60958, and S/PDIF formats. The device features a digital recording function with sampling rates of 32KHz, 44KHz, and 48KHz. The optical output supports a 48KHz sampling rate. It offers full duplex audio stream playback and recording without requiring a built-in PC sound card. Compatibility includes Windows operating systems. The interface is USB 2.0, backward compatible with USB 1.1, and supports full-speed transmission up to 12Mbps. Connectivity includes three input terminals (one fiber optic input) and four output terminals (one fiber optic output). It is suitable for use with HTPC home theater systems and can connect to 5.1 active speakers or headphones. Condition: New. Origin: China. Package includes: 1 x Sound Card.