Ugreen Bluetooth 5.0 Usb Adapter Cm390 Driver -

Solution: Update the driver. Older generic drivers have high latency. The official Realtek driver reduces HID polling latency. Also, ensure line-of-sight—the CM390 is small, so plugging it into the back of a metal desktop tower kills the signal. Use a front port or an extension cable.

Before downloading any driver, it’s crucial to understand that UGREEN does not manufacture Bluetooth chips. They purchase reference designs from chipset vendors. The driver you need depends entirely on the Bluetooth chip inside your specific revision of the CM390.

Key Specifications of the CM390:

Why this matters: Searching for “UGREEN CM390 driver” on UGREEN’s official website often redirects you to a generic Realtek driver package. This is because UGREEN leverages Realtek’s reference drivers.

Important Note: Do not confuse the CM390 with the older CM388 (Bluetooth 4.0) or the CM491 (Bluetooth 5.3). Drivers are not interchangeable. ugreen bluetooth 5.0 usb adapter cm390 driver

This is the most confusing part for new users. Here is the truth:

Conclusion: Even if Windows auto-installs a driver, you should manually install the official UGREEN/Realtek driver for stability. Solution: Update the driver

Related search suggestions: (UGREEN Bluetooth 5.0 adapter driver, CM390 driver Windows, UGREEN CM390 firmware)

As of 2025, UGREEN hosts drivers on their Google Drive or static servers. Here is the process: Why this matters: Searching for “UGREEN CM390 driver”