Cedreo
Q: Is the M-Tech BT-05 compatible with Windows 11? A: Yes, but you may need to install the driver in Windows 8/7 compatibility mode. Right-click the setup.exe > Properties > Compatibility > Run as Windows 8.
Q: Can I use this adapter for a Bluetooth keyboard in BIOS? A: No. Bluetooth dongles require an OS driver to function. For BIOS access, use a wired or 2.4GHz wireless keyboard.
Q: Why does my BT-05 only show up as a "USB Serial Converter"? A: This means the driver didn't load correctly. The chip is in a default state. Reinstall the driver following the manual "Have Disk" method above.
Q: Where is the official M-Tech driver download page?
A: Unfortunately, M-Tech does not provide a central driver repository. The best source is the included mini CD or trusted generic CSR drivers from MajorGeeks or the GitHub repo csr-bluetooth-4.0-driver. driver bluetooth m-tech bt-05
Disclaimer: Verify file hashes before installation. We do not host files directly.
Final Pro Tip: Once you get the driver working, right-click the Bluetooth icon in the system tray and select "Show Bluetooth Devices." If the icon disappears after sleep mode, disable "USB Selective Suspend" in your Power Plan. This keeps the adapter alive permanently.
If you continue to have issues, comment below with your Windows version and the Hardware ID from Device Manager (Right-click device → Properties → Details → Hardware Ids). A code starting with USB\VID_0A12&PID_0001 confirms a genuine CSR chip and completely solvable driver problem. Q: Is the M-Tech BT-05 compatible with Windows 11
Q: Is the M-Tech BT-05 compatible with Windows 11? A: Yes, but you must disable Memory Integrity (Core Isolation) temporarily to install legacy CSR drivers. After installation, you can re-enable it.
Q: Can I use this for Xbox Controller or PS4 controller? A: Yes, both work over Bluetooth 4.0. For Xbox One controllers, ensure the controller has the Bluetooth logo (older models do not). For PS4, use DS4Windows after the driver is installed.
Q: Why does my BT-05 work on one PC but not another? A: USB port voltage. The BT-05 draws minimal power, but some front-panel USB ports on old PCs fail to initialize it. Plug it directly into a motherboard USB port on the back. Final Pro Tip: Once you get the driver
Q: Where is the official M-Tech website? A: M-Tech is a rebrander. There is no official driver support page. Do not search for "M-Tech support"—they redirect to generic Realtek or CSR pages.
Windows 7 does not fully support Bluetooth 4.0 LE out of the box.