UGREEN Bluetooth 5.0 Dongle CM390 – USB Wireless Adapter for Windows PC
The UGREEN CM390 is a compact USB-A Bluetooth dongle that adds Bluetooth 5.0 wireless connectivity to desktop and laptop PCs running Windows. It supports Bluetooth 5.0 BR+EDR and BLE, strengthening both the stability and speed of wireless audio and data connections, and handles up to five devices simultaneously. It suits home and office users who need a reliable, low-cost route to wireless peripherals without replacing hardware.
Technical Specifications
Connectivity
| Parameter | Detail |
|---|---|
| Bluetooth Version | 5.0 BR+EDR, BLE |
| Built-in Chip | Realtek RTL8761BUV |
| USB Interface | USB 2.0 Type-A |
| Frequency Range | 2,402 MHz – 2,480 MHz |
| Transmission Distance | Up to 20 m (open space) |
| Data Transfer Rate | Up to 2–3 Mbit/s (with EDR) |
Supported Bluetooth Profiles
| Profile | Use |
|---|---|
| A2DP 1.2 | Stereo audio streaming |
| AVRCP 1.4 | Media playback remote control |
| HFP 1.5 | Hands-free calling |
| HSP 1.2 | Headset basic audio |
| HID | Keyboards, mice, game controllers |
| PAN | Bluetooth personal area networking |
| GAVDP / DID / IOPT | Generic audio/video, device identification |
Compatibility and System Requirements
| Parameter | Detail |
|---|---|
| Compatible OS | Windows 7 (driver required), 8, 8.1, 10, 11 |
| Driver-Free OS | Windows 10, 11 |
| Console Compatibility | Not compatible with PS3, PS4, PS5, Switch, or Xbox consoles |
| Wireless Device Support | Bluetooth devices only; RF wireless devices not supported |
Backward Compatibility
| Standard | Supported |
|---|---|
| Bluetooth 4.2 / 4.1 / 4.0 | Yes |
| Bluetooth 3.0 / 2.1 / 2.0 / 1.1 | Yes |
Physical
| Parameter | Detail |
|---|---|
| Model Number | CM390 (SKU: 80889) |
| Material | ABS |
| LED Indicator | Yes |
| Power Supply | USB bus-powered |
| Form Factor | Nano/mini dongle |
Warranty
| Parameter | Detail |
|---|---|
| Warranty | 2 years (UGREEN official stores and authorised sellers) |
Use Cases and Applications
Adding Bluetooth to a Desktop PC Without Native Wireless Hardware
Many mid-range and budget desktop towers ship with no Bluetooth hardware. The CM390 addresses this directly. Plug it into any rear USB 2.0 port, and Windows 10 or 11 detects it without requiring a driver download. It works particularly well when pairing a wireless keyboard and mouse alongside a Bluetooth headset — all from one dongle. However, users should disable any existing Bluetooth devices in Device Manager beforehand to prevent driver conflicts.
Home Office Peripheral Management
For workers managing multiple input and audio devices, the CM390 handles up to five concurrent Bluetooth connections. A practical home office setup might include a Bluetooth headset for calls, a wireless mouse, a keyboard, and a phone paired for audio handoff — all active simultaneously. Furthermore, the 20-metre range covers most open-plan office or home office environments without signal degradation.
Upgrading an Older Laptop
Laptops shipped with Bluetooth 4.0 or 4.1 modules benefit from the step-up in range and speed that Bluetooth 5.0 provides. The CM390’s nano form factor sits flush against the chassis without obstructing adjacent USB ports. Additionally, its backward compatibility with Bluetooth 4.x and earlier means it works with older peripherals still in use without requiring new hardware throughout.
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