Ugreen Bluetooth 5.0 Usb Adapter Cm390 Driver Online

The Complete Guide to the UGREEN Bluetooth 5.0 USB Adapter (CM390): Drivers, Setup, Troubleshooting & Alternatives

Introduction: Why the UGREEN CM390 Remains a Top Choice

In an era where desktop PCs and older laptops still lack native Bluetooth connectivity, the USB Bluetooth dongle remains one of the most cost-effective upgrades you can buy. Among the crowded market of adapters, the UGREEN Bluetooth 5.0 USB Adapter (Model CM390) has carved out a reputation for reliability, range, and driver stability.

However, like any hardware, the “plug-and-play” promise often collides with the reality of Windows driver conflicts, missing Linux firmware, or macOS compatibility hurdles. If you have searched for the term “UGREEN Bluetooth 5.0 USB Adapter CM390 driver,” you are likely facing one of three scenarios:

1. You just bought the adapter, and Windows failed to auto-install the driver.
2. The adapter is recognized but won’t scan for devices (or keeps disconnecting).
3. You are trying to get it to work on Linux, older Windows builds, or macOS.

This article will serve as the ultimate resource. We will cover the chipset information, official and generic driver sources, step-by-step installation guides for Windows 10/11, tweaks for Linux (Ubuntu/Debian), Android compatibility, and a detailed troubleshooting section.

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Step 2: Direct Download from UGREEN

As of 2025, UGREEN hosts drivers on their Google Drive or static servers. Here is the process:

1. Go to www.ugreen.com/pages/download-center.
2. Search for “CM390” or “Bluetooth 5.0 Adapter”.
3. Download the file named like UGREEN_Bluetooth_5.0_Driver_CM390.zip.
4. Inside, you will find:
   • Setup.exe (Driver installer for Windows 7/8/10)
   • README.txt with manual installation instructions.
   • Driver folder with .inf files.

Part 10: Final Checklist – Is Your UGREEN CM390 Driver Working Perfectly?

After installation, run through this checklist:

1. Device Manager: No yellow exclamation marks.
2. Bluetooth Tray Icon: Right-click > "Add a Bluetooth Device" – does the window open?
3. Pairing Test: Pair a known device (e.g., Sony XM5 headphones or Logitech MX Master 3).
4. File Transfer: Send a small JPG from your phone to your PC. If it works, the OBEX driver is loaded.
5. Audio Quality: Play music through Bluetooth headphones. Try a YouTube video. Is there a stutter? (If yes, see Issue #2 above).
6. Range Test: Walk 10 meters away (30 feet). Does the connection drop? If it drops, ensure you aren’t using a USB 3.0 hub.

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4. Known Issues & Troubleshooting

• "Bluetooth was removed from this device" Error:
  • This is a common error if the adapter is plugged in before the software is installed.
  • Fix: Uninstall the device in Device Manager, unplug the adapter, run the driver installer, restart, and plug it back in.
• Audio Stuttering/Cut-outs:
  • Bluetooth 5.0 operates on the 2.4GHz band. If the adapter is plugged into a USB 3.0 port directly next to a USB 3.0 hard drive or WiFi adapter, interference may occur.
  • Fix: Use a USB extension cable to move the adapter away from the PC case or other wireless devices.
• Headset Microphone Not Working:
  • This is a limitation of the Bluetooth HSP/HFP protocol (bandwidth constraints), not a fault of the adapter. The adapter supports the Hands-Free Profile, but audio quality will be mono/low-fidelity when the mic is active.

Conclusion: Master Your UGREEN CM390

The UGREEN Bluetooth 5.0 USB Adapter CM390 is one of the best $10-$15 investments you can make for an older PC. However, the hardware is only half the story. The UGREEN Bluetooth 5.0 USB Adapter CM390 driver is the real key to unlocking low-latency audio, stable file transfers, and seamless peripheral pairing. ugreen bluetooth 5.0 usb adapter cm390 driver

To recap:

• Download only from UGREEN Support or Realtek.
• Uninstall Microsoft’s generic driver first.
• Disable USB power saving for stutter-free audio.
• Use a USB extension cable for desktop PCs.

Do not let driver confusion ruin your experience. Follow this guide, and within 10 minutes, your old desktop will be streaming music to high-end headphones and connecting to a mechanical keyboard as if it were a brand new laptop.

If you found this guide helpful, check the official UGREEN website for the latest driver version 3.2.1 or higher. Your Bluetooth devices will thank you.

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Disclaimer: Product specifications and driver links are accurate as of 2025. Always verify compatibility with your specific OS version.

The Ugreen Bluetooth 5.0 USB adapter CM390 is a device that enables users to add Bluetooth functionality to their computers or laptops that lack built-in Bluetooth capabilities. This adapter is particularly useful for those who want to connect their Bluetooth devices, such as headphones, speakers, or smartphones, to their computers without the hassle of cables.

Overview of the Ugreen Bluetooth 5.0 USB Adapter CM390 The Complete Guide to the UGREEN Bluetooth 5

The Ugreen Bluetooth 5.0 USB adapter CM390 is a small, compact device that plugs into a USB port on a computer or laptop. It uses the latest Bluetooth 5.0 technology, which provides a stable and fast connection to Bluetooth devices. The adapter supports a wide range of Bluetooth devices, including headphones, speakers, smartphones, and tablets.

Key Features of the Ugreen Bluetooth 5.0 USB Adapter CM390

• Bluetooth 5.0 technology for fast and stable connections
• Compact and portable design
• Easy to install and use
• Supports a wide range of Bluetooth devices
• Compatible with Windows, macOS, and Linux operating systems

Driver Installation and Configuration

To use the Ugreen Bluetooth 5.0 USB adapter CM390, users need to install the necessary drivers on their computers. The drivers can be downloaded from the Ugreen website or from the manufacturer's CD (if provided). The installation process is straightforward and easy to follow.

Once the drivers are installed, users can configure the adapter to work with their Bluetooth devices. This involves pairing the devices with the adapter, which can be done using the Bluetooth settings on the computer or laptop.

Benefits of Using the Ugreen Bluetooth 5.0 USB Adapter CM390 You just bought the adapter, and Windows failed

The Ugreen Bluetooth 5.0 USB adapter CM390 offers several benefits to users, including:

• Convenience: The adapter provides a easy way to connect Bluetooth devices to computers or laptops that lack built-in Bluetooth capabilities.
• Flexibility: The adapter supports a wide range of Bluetooth devices, making it a versatile solution for users with multiple devices.
• Cost-effective: The adapter is an affordable solution compared to buying a new computer or laptop with built-in Bluetooth capabilities.

Common Issues and Troubleshooting

Some common issues that users may encounter when using the Ugreen Bluetooth 5.0 USB adapter CM390 include:

• Connection problems: Users may experience difficulties connecting their Bluetooth devices to the adapter.
• Driver issues: Users may encounter problems installing or updating the drivers for the adapter.
• Interference: Users may experience interference from other devices that use the same frequency band as the adapter.

To troubleshoot these issues, users can try restarting the adapter and their Bluetooth devices, updating the drivers, or moving the adapter to a different USB port.

Conclusion

The Ugreen Bluetooth 5.0 USB adapter CM390 is a useful device that enables users to add Bluetooth functionality to their computers or laptops. With its compact design, easy installation, and fast connection speeds, it is an ideal solution for users who want to connect their Bluetooth devices to their computers without the hassle of cables. By understanding the features, benefits, and potential issues of the adapter, users can get the most out of their device and enjoy a seamless Bluetooth experience.

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Driver Sources

There are two recommended methods to obtain the driver:

1. Official UGREEN Website (Recommended):
   • Visit the UGREEN support page.
   • Search for "CM390".
   • Download the driver zip file (usually titled something like UGREEN_Bluetooth_Adapter_CM390_Driver.zip).
2. Windows Update (Manual Force):
   • In some instances, Windows Update will detect the "Realtek Semiconductor Corp." hardware ID and install a generic driver, but this is often unreliable on the first attempt.