The ASUS Xonar U1 Audio Device is a USB external sound card produced by ASUS. It is part of the Xonar series of sound cards, which are known for providing high-quality audio for both gaming and media consumption. The Xonar U1 is a compact external USB sound device that connects to your computer via a USB port and provides enhanced audio output, often used in laptops or systems without dedicated audio hardware.

The ASUS Xonar U1 Audio Device driver is the software that enables the operating system (Windows) to recognize and use the sound device for audio output and input. It allows the device to communicate with Windows and enables features such as surround sound, better audio quality, and support for headphones and speakers.