: Go to Device Manager , right-click the unknown device, select Properties > Details , and choose Hardware Ids . Copy the VID and PID codes into a search engine. This often leads to the specific Chinese factory driver repository required for that exact model.
This is usually a USB power management issue. jieli br21 driver link
What are you using (Windows 10, 11, Linux)? : Go to Device Manager , right-click the
If your device isn't working, it is likely a configuration issue rather than a missing driver: System Recognition : Check your sound settings for a device named JieLi BR17 : Go to Device Manager