Some Jieli chips can accidentally enter a "Mass Storage" mode for firmware updates. If this happens, the computer sees it as a drive instead of an audio device.
: The official developer portal for JieLi is hosted on GitHub (Jieli-Tech) , where they provide update tools and documentation for various chip series including BR17, BR21, and BR22. jieli br21 driver link
Before downloading a driver, it is important to understand what the BR21 actually is. Unlike standard Bluetooth dongles that add a Bluetooth radio to your PC, many Jieli-based devices act as or USB Sound Cards . Some Jieli chips can accidentally enter a "Mass