Driver Bluetooth M-tech Bt-05 -

Driver Guide — M-Tech BT-05 Bluetooth Adapter

Final Verdict: Should You Keep the BT-05?

The M-Tech BT-05 is a finicky but functional piece of hardware. It is not for beginners. If you want a truly plug-and-play experience, spend $10 more on an Asus USB-BT500 (Bluetooth 5.0). However, if you already own the BT-05 and are patient enough to follow the manual driver steps above, it works perfectly for:

• Wireless mice (Logitech, Microsoft)
• Keyboards (Anne Pro, Keychron)
• File transfers to Android phones
• Legacy Bluetooth speakers (SBC codec only)

Windows 10 / 11

1. Plug in the BT-05.
2. If Windows installs automatically, test first (skip to Testing). If not:
3. In Device Manager, right-click device → Update driver → Browse my computer for drivers → Let me pick → Have Disk, then point to the downloaded driver folder (or choose the provided .inf).
4. If driver package is an installer (.exe/.msi), run it as Administrator and follow prompts, then reboot if requested.
5. After installation, restart the computer. Confirm in Device Manager the device appears under “Bluetooth” without warning icons.

Notes:

• If Windows keeps installing a generic driver that doesn’t work, uninstall the device (right-click → Uninstall device — check “Delete driver software for this device” if present), unplug, install chipset driver manually, then replug.
• For Broadcom/WIDCOMM drivers, you may need to install WIDCOMM Bluetooth Software package.
• For Realtek-based sticks, use Realtek Bluetooth driver package matching your Windows version (x64/x86).

The Adapter is Detected as "BCM2045A0"

This means your Windows has misidentified the CSR chip as a Broadcom chip. You must manually override the driver via "Have Disk" in Device Manager, selecting the CSR .inf file directly. driver bluetooth m-tech bt-05

2. If it is NOT working automatically (Yellow exclamation mark in Device Manager)

If Windows fails to install it, you need the generic CSR Bluetooth driver. Driver Guide — M-Tech BT-05 Bluetooth Adapter Final

Safe download source (Chipset vendor):

• Go to the Realtek official website or StationDrivers (trusted for Bluetooth chips).
• Search for: "Realtek Bluetooth USB Adapter Driver"
• OR use the driver that matches the chip ID: USB\VID_0A12/PID_0001 (common for BT-05).

Easiest working driver (for older Windows 7/8): Windows 10 / 11

• Download the driver from the M-Tech official support site (if still active).
• Or use the generic CSR Harmony driver (v2.1.63.0 or newer).

Use Cases and Limitations

The primary use case for the M-Tech BT-05 is retro-fitting old computers. A Windows 7 desktop from 2010 or a Linux machine lacking built-in Bluetooth can gain wireless audio and peripheral support for under $10. It is also useful for adding Bluetooth to a Raspberry Pi (if the Pi’s built-in radio is inadequate) or to a PC used as a home media server. However, the adapter has significant limitations: it does not support aptX or LDAC codecs for high-quality audio, it may struggle with simultaneous connections (e.g., a mouse, keyboard, and headphones at once), and its antenna design (embedded PCB trace) provides shorter real-world range (10–15 meters) than the theoretical 50 meters.