It is often found in devices costing under $20, providing Bluetooth and USB DAC functionality at a fraction of the price of branded chips. Versatile Connectivity:
I can confirm this works with Ubuntu 22.04. Using at terminal lsusb lists as: "ID 4c4a:4155 Jieli Technology USB Composite Device" Ask Ubuntu Jieli USB Dongle 4.0 Update Tool Manual Jieli Br21 Driver
Look under if the driver does not install automatically. 2. Device Manager Forced Search It is often found in devices costing under
Are you trying to with a specific device, or are you looking for programming resources for the chip? Jieli BR21 Bluetooth dongle shown as storage device The BR21 is a chip: it can act
Sometimes Windows misses the specific audio handover protocol.
The BR21 is a chip: it can act as both transmitter and receiver, often switchable via a physical toggle or button.
Many BR21 adapters are hardcoded to act as a "USB Sound Card." They receive Bluetooth audio from your phone and pipe it into the computer as a microphone input. They cannot "search" for other Bluetooth devices from your PC. Missing "Mode" Switch: