Microsoft Surface USB-C Travel Hub: the host’s power changes its USB ports review

Check host power before relying on the USB specifications

The Microsoft Surface USB-C Travel Hub is useful for a presentation desk: one external display, wired networking and a small pair of accessory-data ports. Its unusually important condition is how much power the computer supplies to the hub. Both USB-A and USB-C can operate at their advertised 10Gbps capability together only when the host port supplies 5V at 3A, or 15W.

This is power from the computer to the hub, not a notebook charging rating. The hub does not charge the computer. A reader can therefore have a suitable high-power USB-C host connection and still need the notebook's usual charger connected separately. Microsoft's use of accessory pass-through charging should not be confused with laptop Power Delivery.

The lower-power arrangements are different

At 5V1.5A, or 7.5W from the host, Microsoft permits only one of the two USB ports at a time. The selected USB-A or USB-C connection is limited to USB2.0, at 480Mbps. That is a different usable arrangement from the 15W route, rather than two slower sockets that both remain available together.

Below 7.5W, the USB-A port remains limited to USB2.0 and the downstream USB-C port cannot be used. Microsoft gives Surface Go as an example of a device with a 7.5W USB-C port and advises checking the exact computer manufacturer's specification. The Surface name on the hub is not proof that every Surface supplies the same accessory power.

When the host supplies 15W, the two data ports still share the connection back to the computer. They do not become independent 10Gbps channels. Microsoft's interface figures describe supported USB modes, not measured simultaneous copying rates. A connected drive and its cable also need the relevant USB capability.

HDMI and VGA are alternatives

The HDMI2.0 output supports up to 3840 ×2160 at 60Hz. The VGA output supports 1920 ×1080 at 60Hz. Microsoft explicitly says they cannot operate at the same time. This is a one-external-display adapter with a choice of connector, rather than a two-screen dock.

If both video connections are already attached when the computer starts, HDMI has priority. During operation, the last video connection plugged in takes over. For example, inserting VGA after HDMI switches to VGA; reconnecting HDMI selects HDMI again. That behavior is useful to know in a meeting room where both cables may be lying on the table.

The host USB-C port must support Alt Mode for native video. A data-only USB-C route cannot supply that display signal. Microsoft recommends HDMI when there is a choice because it supports the higher resolution. A separately purchased adapter cable is a separate part of the setup, not an additional supplied output connector.

Network and accessory charging

The Ethernet connection supports up to 1000Mbps full duplex. Microsoft also describes Wake on LAN and PXE boot behavior specifically for Surface devices; those management features should not be promised for every connected computer. The 1Gbps figure is the network link capability, separate from the USB-data line rate.

A phone or another suitable accessory can receive power through a data port. Microsoft lists up to 4.5W from each port on the 15W host arrangement, or 2.5W from the one available port on the 7.5W arrangement. Below 7.5W, accessory charging is not available. The downstream USB-C socket also has no video-output function.

A compact travel package with specific limits

The fixed USB-C lead tucks into a magnetic storage recess. The body measures 89 ×48 ×15mm and weighs 99.2g. The current support guide names Windows 11, 10 and 8.1, MacOS10.14 or later and Android 8.1 or later; those general Mac details do not identify exact later Apple chips.

Choose this hub when one HDMI or VGA display and wired networking answer the job, and check host power if both data ports matter. Choose a different dock for two independent displays or notebook charging. Those are explicit limitations of the supported arrangement, not features unlocked by a more expensive USB-C cable.