UGREEN USB 3.0 Hub Ultra Slim 4-Port – CM219 / 25851

The UGREEN CM219 USB 3.0 hub transforms a single USB-A port into four USB 3.0 ports at up to 5Gbps. At just 0.4 inches thick and 33g, it is designed specifically for users who need portable, minimal-footprint port expansion — on the go, at a coffee shop, or on a clean desk setup. The short 15cm integrated USB-A cable keeps the hub close to the host device without trailing cables, and the plug-and-play design requires no drivers across Windows, macOS, Linux, and Chrome OS.

Technical Specifications

Connectivity

• Input: USB-A Male (integrated 15cm cable)
• Output: USB 3.0 Type-A Female × 4
• USB standard: USB 3.2 Gen 1 (USB 3.0)
• Backward compatibility: USB 2.0, USB 1.1

Performance

• Data transfer speed: Up to 5Gbps
• LED indicator: Blue (illuminates when powered and connected)
• Operation: Bus-powered (from host USB port; no auxiliary power port)

Build & Physical

• Cable length: 15cm (integrated, non-detachable)
• Thickness: 0.4 inches (approx. 10mm)
• Weight: 33g
• Colour: Black

In the Box

• 1× UGREEN CM219 USB 3.0 Hub (Black)

Buyer Note: The CM219 / 25851 is designed for data transfer only — it does not charge connected devices. It has no auxiliary power port. For power-hungry peripherals such as 2.5-inch external hard drives, the CR113 / 20291 (with micro USB power port and 1m cable) is the recommended alternative. Additionally, connecting the hub to a USB 2.0 port will limit all four output ports to USB 2.0 speeds.

Compatible Devices

Host devices (USB-A 3.0 required for full 5Gbps speed):

• Laptops and desktops running Windows, macOS, Linux, or Chrome OS
• iMac, MacBook Pro, MacBook Air (USB-A models)
• Dell XPS, Lenovo ThinkPad, HP EliteBook, ASUS ZenBook, Microsoft Surface (USB-A)
• Gaming consoles: Xbox Series X/S, PS5

Connected peripherals (USB-A devices):

• USB flash drives and portable SSDs
• Wired keyboards and mice
• USB webcams and microphones
• Printers and card readers
• USB headphones and speakers

Note: 2.4GHz wireless USB dongles and MIDI devices may experience interference at USB 3.0 speeds. Connect these directly to a host USB port if issues arise.

Use Cases

Travel and mobile work — At 33g and 0.4 inches thick, the CM219 fits in the smallest laptop bag compartment. It provides four USB ports on arrival at a hotel desk, co-working space, or client office without adding noticeable weight to the bag.

Clean desk setups — The 15cm cable keeps the hub adjacent to the laptop rather than dangling across the desk. For users who prioritise minimal cable clutter, the short integrated cable is a deliberate advantage over longer 1m hub cables.

Laptop with limited USB-A ports — Ultrabooks often include only one or two USB-A ports. The CM219 expands this to four simultaneously active ports — enough for a wired mouse, keyboard, flash drive, and webcam at the same time.

Gaming console peripheral expansion — Connect the hub to a USB-A port on an Xbox Series or PS5 to add four USB ports for controllers, headsets, storage drives, and other accessories without reaching around to the back of the console.