Plugable UD-3900

A useful dock for existing HD monitors

Current manufacturer documentation describes two HDMI outputs, with dual screens up to 1920 × 1200 at 60Hz. Older discussions of the UD-3900 may show a different port arrangement. Match the current listing and the actual unit instead of using a photograph from an old review to order cables.

The charger remains a separate connection

This dock does not charge the host. That can be acceptable for a desktop computer, or a laptop whose original barrel-plug charger already stays under the desk. If your purpose is specifically to arrive with one USB-C cable and receive power, choose a charging dock instead.

Reserve faster USB sockets for devices that need them

There are two USB 3.0 sockets and four USB 2.0 sockets. Put low-bandwidth input devices on the latter and keep the faster connections free for a drive or another demanding peripheral. DisplayLink installation is part of the display arrangement; a USB-C connector does not turn this into a native-video Thunderbolt dock.

Connections & compatibility

Connection to laptop

USB-A 3.0 or USB-C

Display technology

displaylink

Maximum displays (conditions apply)

2

Power to laptop (W)

0

HDMI sockets

2

DisplayPort sockets

0

Wired network

Gigabit Ethernet

USB peripherals

2 USB-A 5Gbps; 4 USB-A USB 2.0

Display requirements

Dual 1920 × 1200 at 60Hz; no 4K

Mac notes

Manual DisplayLink installation required

Windows notes

Windows with DisplayLink software

These are published specifications, not results from hands-on testing. Maximum screen counts depend on the laptop, operating system, connection and chosen resolution.