UGREEN CM639 8-in-1 USB-C Triple Display Docking Station (35625)

The UGREEN CM639 triple display dock expands a single USB-C port into eight connections — two 4K HDMI outputs, a 4K DisplayPort, dual USB-C 3.2 Gen 2 data ports, dual USB-A 3.2 Gen 2 ports, and 100W pass-through charging — enabling dual or triple external monitor configurations from one cable. It targets Windows power users, creative professionals, and developers who need high-resolution multi-screen setups without a bulky docking station. Additionally, the aluminium build and integrated cable make it compact enough for desk use or portability between locations.

Technical Specifications

Connectivity

Video Output — Display Mode Matrix

Power

Physical

Compatibility

What This Model Does Not Include

Use Cases and Applications

Windows Multi-Monitor Workstations

Professionals who use two or three external displays for trading terminals, code editors, design canvases, or data dashboards benefit directly from MST support. On a Windows laptop with DP 1.4 Alt Mode, the CM639 drives all three screens at once — two via HDMI and one via DisplayPort — without requiring a dedicated GPU dock or proprietary docking station. Furthermore, the 10 Gbps USB-A ports accommodate external NVMe drives and peripherals alongside active displays.

Video and Photo Editing Setups

Colour grading and retouching workflows often require a reference monitor alongside an editing interface. The HDMI outputs support HDR, meaning a connected HDR-capable display receives full dynamic range metadata from compatible software. Additionally, 10 Gbps USB-C ports allow direct connection of fast external SSDs for scratch storage, removing the bottleneck of slower USB 3.0 connections during active editing sessions.

MacBook Users — Important Compatibility Note

MacBook users can connect up to two external displays via this hub; however, macOS restricts all multi-monitor configurations to mirror mode only. Consequently, both screens will show identical content. For MacBook users who need independent extended displays, a DisplayLink-based docking station is the appropriate alternative. For single-display output, the CM639 works fully on macOS at up to 4K@60Hz HDR.

Portable Desk Setups and Hot-Desking

The aluminium housing and integrated cable make the CM639 easy to move between desks or carry in a laptop bag. A single USB-C connection establishes the entire workstation — displays, peripherals, and laptop charging — within seconds. This suits hot-desking environments where reconnecting multiple cables individually is impractical.