UGREEN CM219 USB 3.0 to 4-Port USB 3.0 Hub

The UGREEN CM219 USB 3.0 Hub is designed to expand a single USB connection into four USB 3.0 ports, making it useful for laptops and desktop computers with limited USB connectivity. It is particularly suitable for office workstations, home setups, technicians, and users who regularly connect several USB accessories.

1. Four USB 3.0 Ports

The UGREEN CM219 provides four USB-A 3.0 ports, allowing several USB peripherals to connect to a computer simultaneously.

Instead of repeatedly disconnecting devices when USB ports run out, users can keep commonly used accessories connected to the hub. Compatible devices include:

• External hard drives
• Portable SSDs
• USB flash drives
• Keyboards
• Mice
• USB wireless receivers
• Printers
• Card readers
• Webcams
• USB accessories

2. High-Speed 5Gbps Data Transfer

The CM219 supports USB 3.0 SuperSpeed data transfer at up to 5Gbps. This makes it significantly faster than USB 2.0, which has a maximum signalling rate of 480Mbps.

The higher bandwidth is particularly useful when transferring large files between a computer and compatible USB 3.0 storage devices.

For example, it can improve transfer efficiency when working with large photos, videos, backups, documents, and other files stored on external SSDs or hard drives.

The 5Gbps upstream bandwidth is shared by connected devices, rather than providing 5Gbps independently to every port.

3. Connect Multiple Devices Simultaneously

One of the main advantages of the CM219 is the ability to operate several compatible USB devices from one computer connection.

For example, you could connect:

Port 1: External SSD
Port 2: USB flash drive
Port 3: Keyboard
Port 4: Mouse

This makes the hub especially convenient for thin laptops that have reduced numbers of built-in USB ports.

4. Suitable for External HDDs and SSDs

The USB 3.0 interface makes the CM219 suitable for connecting compatible external HDDs and portable SSDs.

Users can access files, transfer documents, perform backups, or move large multimedia files without constantly connecting and disconnecting storage devices.

However, external hard drives can require considerably more power than basic accessories such as keyboards and mice. When using multiple high-power devices, the available USB power should therefore be considered.

5. Auxiliary Power Support

Applicable CM219 versions feature an additional power input that can provide supplementary power when several USB devices are connected.

This is particularly useful when connecting power-demanding equipment such as external hard drives.

The auxiliary power connection is intended primarily to provide stable power to connected peripherals. It should not be confused with a dedicated USB charging hub.

6. Backward Compatible with USB 2.0 and USB 1.1

Although the CM219 uses USB 3.0, it can also accommodate many older USB devices.

It is backward compatible with:

USB 3.0 → Up to 5Gbps
USB 2.0 → Up to 480Mbps
USB 1.1 → Lower legacy speeds

Therefore, you can continue using older keyboards, mice, flash drives, printers, and other USB peripherals.

The actual transfer speed will be determined by the slowest interface involved in the connection.

7. Plug-and-Play Operation

The UGREEN CM219 is designed for straightforward plug-and-play operation.

For most common operating systems, users do not need to install dedicated drivers or configuration software.

Simply connect the hub to the computer and then connect the required USB devices.

8. Wide Operating System Compatibility

The hub is compatible with major computer operating systems, including versions of:

• Windows
• macOS
• Linux

This makes it useful in mixed computer environments where different users may have different operating systems.

9. Ideal for Laptops with Limited USB Ports

Modern laptops are becoming thinner, and many now provide fewer USB-A ports than older computers.

The CM219 allows a single compatible USB connection to provide access to four USB-A peripherals, reducing the need to repeatedly swap devices.

It can be particularly useful for a laptop workstation where a user needs a mouse, keyboard, flash drive, and external storage connected simultaneously.

10. Convenient for Desktop Workstations

The CM219 isn’t limited to laptops. It can also provide additional USB connectivity for desktop computers.

For example, if a desktop PC is positioned underneath a desk, the hub can make USB ports more accessible for frequently connected flash drives, card readers, external drives, and other peripherals.

11. Stable Data Transmission

The CM219 is designed to maintain stable communication between the host computer and connected USB peripherals.

This is important when transferring files to external storage because an unstable connection can interrupt file transfers.

For the best performance, USB 3.0 devices should be connected to a USB 3.0-capable host port.

12. Compact and Portable Design

The compact construction makes the UGREEN CM219 easy to carry in a laptop bag, backpack, or accessories pouch.

This makes it suitable for:

• Business travel
• Office work
• Home workstations
• School and university
• Presentations
• Field technicians
• Mobile professionals

13. No External Power Required for Basic Devices

For low-power peripherals such as a keyboard, mouse, flash drive, or USB receiver, the hub can normally draw its operating power from the host USB connection.

Therefore, an external power supply is not necessarily required for everyday low-power accessories.

However, supplementary power may be required when several higher-power devices are connected simultaneously.

14. Suitable for Data Synchronisation

The CM219 can also be used for data synchronisation with compatible USB devices.

This makes it useful for accessing and transferring files between a computer and supported cameras, storage devices, smartphones, and other USB peripherals.

15. Convenient Cable Management

Using one hub for several USB accessories can help simplify desktop cable management.

Instead of routing multiple devices to different ports around the computer, commonly used peripherals can connect through a single central hub.

Key Features

Best Uses for the UGREEN CM219

The UGREEN CM219 4-Port USB 3.0 Hub is an excellent option for expanding USB connectivity on laptops, desktop PCs and office workstations. Its combination of four ports and 5Gbps USB 3.0 performance makes it especially useful for connecting external storage alongside everyday computer accessories.

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