Plugable UD-3900
Here is a closer look at Plugable UD-3900.
About
Plugable's long-running dual-monitor DisplayLink dock, updated in 2025 to standardize on two HDMI outputs (retiring the legacy DVI-I port) — 1920x1200@60Hz dual, no laptop charging.
- Max resolution
- 1920x1200@60Hz
- Requires DisplayLink driver
- Yes
Ports: 2× HDMI, 2× USB-A 3.0, 4× USB-A 2.0, 1× Ethernet (Gigabit), 1× Audio headphone and 1× Audio microphone
Confirmed with
- Notebook (generic)
The original 2013 hardware revision used one DVI-I and one HDMI port; a February 2025 board revision standardized on two HDMI outputs instead, retiring the DVI-I connector permanently. No Power Delivery — the base has no electronics to supply charging current to the host.