Ideal Choice: The USB audio adapter is the ideal replacement for your faulty sound card or audio port. It expands the 3.5mm mono microphone input and speaker-headphone output through the USB interface, allowing you to connect small speakers, earphones, microphones, dual-plug earphones, and more. Superior Features: With its built-in DAC high-resolution chip, the external audio sound card for PC provides you with high-fidelity audio, avoiding electromagnetic interference and making the sound clearer. It's plug and play, USB powered, and requires no external power. Compact and Portable: The Aux to USB adapter is constructed with durable ABS material that makes it easy to take on the go. Crystal-Clear Sound: With a built-in DAC chip, this USB audio adapter delivers rich and immersive audio. The USB Aux adapter facilitates high-resolution audio output and noise reduction up to 16bit/48kHz to enhance the original sound quality of your devices.