The Plugable UD-3900H is a USB-C docking station that adds triple monitor support to your laptop. With two HDMI and one DisplayPort output, it can drive up to three 4K displays at 60Hz, making it perfect for productivity and creative workflows. It delivers 100W Power Delivery charging to your laptop and offers a full set of ports including Gigabit Ethernet, four USB 3.0 ports, and an SD card reader.
Key Features
- Triple display output: 2x HDMI (4K@60Hz) + 1x DisplayPort (4K@60Hz)
- 100W Power Delivery for charging and data over a single USB-C cable
- Additional ports: Gigabit Ethernet, 4x USB 3.0 Type-A, combo audio jack, SD card slot
- Compact and durable all-metal housing
Compatibility Guide
Requires a laptop with USB-C supporting DisplayPort Alt Mode (or Thunderbolt 3/4). Works with Windows 10/11 and macOS 10.14+. For best performance, use the included AC adapter; the dock's charging capability may be limited for high-power gaming laptops.
Ideal Use Cases
- Remote workers and professionals needing a clean multi-monitor setup
- Creative users who want to connect multiple external displays
- Anyone looking to reduce cable clutter on their desk
Upgrade Considerations
Before purchasing, verify that your laptop's USB-C port supports DisplayPort Alt Mode and that your monitors are compatible. For laptops drawing more than 100W, the dock's PD may not keep the battery charged under heavy load; an additional power supply may be needed.