The UGREEN CM390 is a compact USB adapter designed to add Bluetooth 5.0 connectivity to your desktop or laptop, allowing you to link up to five devices simultaneously. Powered by the RTL8761BUV chipset and supporting protocols like A2DP and HID, it enables you to connect everything from wireless headphones and speakers to keyboards, mice, and game pads. This small black dongle is lightweight and unobtrusive, featuring a simple LED indicator that flashes during pairing and stays solid once a connection is established. It works with Windows 7, 8.1, and 10, providing a stable wireless range of up to 30 meters in open spaces. Because it supports automatic reconnection, your peripherals will link back up quickly after the computer wakes from sleep, making it a practical choice for anyone looking to clear cable clutter from their workspace.