1. Connect to a computer using a standard USB cable, or connect to a smartphone or music player using an OTG Type-C cable to skip tracks, adjust volume with the knobs, and mute with a single button press.
2. You can download our dedicated FiOo keyboard driver from the official FiOo website to freely customize button functions and lighting effects, expanding your personalized user experience. Both buttons and the knob support customization—they can be used for music control, programmed as Ctrl+C/V for programmers, or configured with complex key combinations or character strings.
3. The HiFi Keypad is compatible not only with Fiio’s existing devices but will also support future releases, such as desktop digital audio players.
*A USB cable is not included in the package. When connecting to a computer, use a standard USB-A to Type-C data cable; when connecting to a smartphone, use a Type-C to Type-C OTG data cable (such as the Fiio LT-TC1).

On Jul 2, 2026 at 18:49:10 PDT, seller added the following information: