FIIO QX13 Black Titanium Gold from an authorized Japanese includes serial Portable headphone amplifier with USB desktop and app support (FIO-QX13-B,

A new chapter in high-performance audio dongles: the QX Series Desktop mode for high power output and power saving, and intelligent power control for optimal performance Equipped with flagship desktop-grade DAC "ES9027PRO" to accurately restore audio signals Specially designed audio circuitry comparable to desktop DAC/headphone amplifiers Equipped with six high-end TI operational amplifiers, it delivers powerful, stable output with high efficiency. "XMOS XU316" delivers high-grade USB audio performance Pursuing performance beyond the limits with a full carbon fiber body Extra-large color display for clear visibility A rich ecosystem that combines portability, expandability, and quality Multi-layer shielding separates digital and analog sections to prevent noise interference and efficiently dissipate heat The QX13 is the premium model of the KA17. This dongle USB DAC/amp delivers a maximum output of 900mW (desktop mode), rivaling that of a desktop amplifier. The ESS second-generation flagship DAC "ES9027PRO" and six TI op amps deliver impressive driving power, easily powering even the most demanding headphones. Choose from a 21-layer carbon fiber body or aluminum alloy. The large 1.99-inch IPS display provides excellent operability. The XMOS XU316 supports PCM768kHz/DSD512. Includes a magnetic leather case and a special 8-core cable. E-Stick compatibility allows you to create a desktop environment even on the go.