■ This is a small, high-resolution DAC. It's plug-and-play, allowing you to enjoy high-quality sound for games, movies, and more. It supports stereo headphone output, line input, microphone input, and 5.1ch/7.1ch output. ■ The headphone output supports sampling rates and resolutions from 44.1Khz/16bit to 384Khz/24bit, and 7.1 surround audio supports a sampling rate of up to 48KHz. You can enjoy your favorite high-resolution music on Spotify, YouTube Music, Apple Music, Amazon Music, and more. ■ You don't need to worry about compatibility, and no external power supply is required. This sound card works seamlessly even on PCs and MacBooks that don't have a built-in 7.1 sound card. ■ Line input x 1, TRS microphone input x 1, | Output - TRRS headphone x 1, 3.5 mm audio interface x 4. ■ I purchased this, but I've decided to sell it because a friend gave me another DAC. It's only been opened. https://www.cubilux.com/products/7-1-5-1surround-sound-crad