StarTech USB C Multiport Adapter (127B-USBC-MULTIPORT)

This is what matters about StarTech USB C Multiport Adapter (127B-USBC-MULTIPORT).

About

A dual-state StarTech travel dock — the same USB-C receptacle handles PD charging when a wall adapter is present, or downgrades to USB 2.0 data when it isn't, with 85W of passthrough.

HDMI version
2.0
DisplayPort version
1.4
DP Alt Mode
Yes
Power Delivery in
100W
PD passthrough to host
85W
Max resolution
3840x2160@60Hz
Requires DisplayLink driver
No

Ports: 1× HDMI (HDR10), 3× USB-A 3.2 Gen1 (5Gbps), 1× Ethernet (Gigabit) and 1× USB-C (PD 3.0 shared with USB 2.0 data)

Confirmed with

  • Notebook (generic)

    Engineering trade-off unique to this model: the USB-C receptacle handles PD charging (retaining 15W operationally, passing 85W to the host) when a wall adapter is present, but automatically switches roles to a USB 2.0 (480Mbps) data port whenever no adapter is connected — allowing peripheral use purely on battery power.