What is the (the VID/PID mentioned above) from the Device Manager?

If you are using Windows 10 or Windows 11, follow these steps to manually install the driver:

If you want, provide the output of Device Manager hardware IDs or lsusb (VID:PID) and your OS, and I’ll identify the chipset and link the likely driver.

Right-click the downloaded executable file and select .

Needed only for older 2012-era CSR drivers.

Bluetooth v2.0 + EDR (Enhanced Data Rate) or Bluetooth v4.0 (depending on the hardware revision generation).

If Windows Update fails to find the driver, you must install the chipset driver manually. Because M-Tech devices widely use CSR or Realtek components, these generic stacks offer the highest stability. Step 1: Download the Driver Stack

If your BT-05 was purchased after 2020, it may have switched to Realtek.

I can provide step-by-step instructions tailored to your specific setup. Share public link

Typically utilizes generic CSR (Cambridge Silicon Radio) or Realtek chipsets.