UGREEN Bluetooth 5.3 Adapter CM591 – USB Dongle for Windows PC

The UGREEN CM591 is a compact USB-A Bluetooth dongle that adds wireless connectivity to any desktop or laptop PC without Bluetooth built in. Running on Bluetooth 5.3 with the ATS2851 chip, it handles a broad range of peripherals — from keyboards and mice to headphones and speakers. It targets Windows users who want a straightforward, no-fuss upgrade path to wireless device connectivity.

Technical Specifications

Connectivity

Supported Bluetooth Profiles

Compatibility and System Requirements

Physical

Warranty

Use Cases and Applications

Upgrading a Desktop PC Without Built-in Bluetooth

Many desktop towers ship without Bluetooth hardware. The CM591 resolves this immediately. Plug it into any rear or front USB 2.0 port, and Windows detects it within seconds. It works particularly well for users who want to connect a wireless keyboard and mouse while simultaneously streaming audio to a Bluetooth headset — all from a single dongle. However, for best results, disable any existing Bluetooth hardware in Device Manager before inserting the adapter to avoid driver conflicts.

Wireless Peripheral Management at a Workstation

For users managing multiple input and audio devices, the CM591 handles up to five Bluetooth devices concurrently. A typical workstation setup might pair a Bluetooth mouse, keyboard, headphones, a mobile phone for hands-free calls, and a Bluetooth numpad — all active at once. The 20-metre range furthermore provides enough coverage for small office environments, meaning users are not tethered to their desk.

Portable Connectivity for Laptops

Older laptops with dated Bluetooth hardware — or those where the internal module has failed — benefit from the CM591’s nano profile. It sits virtually flush with the chassis and does not interfere with adjacent ports or a laptop bag. Additionally, because no driver installation is needed on Windows 10 or 11, the adapter works reliably across multiple machines without reconfiguration.