This is the YULONG SABRE D18 DAC, featuring the ESS ES9018S. It does not have a USB port. If you want to connect it to a PC using USB, please use a DDC (Digital-to-Digital Converter). Alternatively, you can use it by connecting it through another DAC with a digital output. The build quality is excellent, and high-quality components are used inside. I was very fond of its sound, but I'm selling it because I've changed my equipment. - Model Name: YULONG SABRE D18 - Digital Input Terminals: Optical, Coaxial, AES/EBU - Analog Output Terminals: RCA, XLR - Exterior Material: Aluminum Thank you for looking. Please consider it.