🔹 On Windows , the BR21 usually works with generic Bluetooth or USB audio drivers. However, for firmware updates or advanced configuration (e.g., changing device name, EQ settings, or button mapping), you’ll need the Jieli USB driver (often labeled JL_UART_Driver ).

If you’re working with Bluetooth audio modules—especially the popular —you’ve probably run into the need for proper drivers. Here’s the quick lowdown:

🔹 It’s a low-cost, feature-rich Bluetooth 5.0 audio module commonly used in DIY speakers, Bluetooth receivers, car aux adapters, and soundbars.

For basic use as a Bluetooth receiver, no extra driver is needed. For hacking or customizing, track down the official Jieli toolset and driver.