If the device is detected but fails to pair, the installed generic driver may be incompatible. Uninstall the current driver in Device Manager, then install the latest WHQL-certified MediaTek driver version 25.20.3.55.
Up to 10–20 meters (Class 2 radio specification) Operating System Compatibility
You can often find the driver on the included mini-CD, but if you do not have a disc drive, you can use the driver recommended by sellers, which is based on the CSR Harmony framework. 3. Installation Steps
If your BT-05 was purchased after 2020, it may have switched to Realtek.
: Nano-sized for portability; can remain plugged in without blocking adjacent ports. Driver & Compatibility