Br21 Driver: Jieli

If you are using a mixer, look for a physical "ST/USB" or "PC" button on the hardware that must be pressed to activate the USB interface. 3. For Developers: Firmware and SDKs

When you plug a wired headset into a PC, Windows instantly recognizes it because USB and 3.5mm audio jacks use generic, universal drivers. Bluetooth is more complex. Jieli Br21 Driver

Since Jieli does not release standalone "driver installers" for consumers, you must rely on Windows Update. If you are using a mixer, look for