When prompted by the installer (or after the installation completes), plug the UGREEN CM390 into a USB 2.0 or 3.0 port .

For macOS users, the CM390 driver installation process is relatively straightforward:

: Once installed, a Bluetooth icon should appear in the lower-right corner of your taskbar. Manual Driver Installation

: Provides faster data transmission, higher stability, and lower power consumption compared to older versions .

Device Manager → Bluetooth → Right-click your adapter → Properties → Advanced tab. Look for "LMP (Link Manager Protocol) version".