The term typically refers to a Bluetooth USB Interface v1 . It is commonly associated with legacy Bluetooth dongles (adapters) produced during the mid-to-late 2000s, particularly those based on Broadcom or Cambridge Silicon Radio (CSR) chipsets. These dongles were ubiquitous for adding wireless connectivity to desktop computers.

: Look for a file named setup.exe or install.exe and double-click it.

Check the hardware ID in Device Manager and search for that specific VID/PID code. The solution is almost always the same: an old Broadcom driver and a lot of patience.

Click , select the extracted folder containing the driver files, and click Next .