Before understanding the driver, it helps to understand the hardware. The Jieli BR21 is a highly integrated Bluetooth audio chip designed for low power consumption and high-quality audio transmission. It typically supports:
—but instead of working as a Bluetooth dongle, it appears as a mass storage device or a virtual CD-ROM. Jieli Br21 Driver
Since Jieli does not release standalone "driver installers" for consumers, you must rely on Windows Update. Before understanding the driver, it helps to understand
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. Before understanding the driver