The HDMI connection supports a maximum resolution of 3840 x 2160 at   60Hz.

2. Ethernet port

Get the reliability and speed of a wired network connection. Connect   your PC to a wired network using the Ethernet port.

It supports up to 1000 Mbps full duplex speed, along with Wake on LAN,   and booting from a PXE server (on Surface devices only).

3. VGA

Use a VGA connection to connect to an external display that has a VGA   port.

The VGA connection supports a maximum resolution of 1920 x 1080 at   60Hz.

Notes:

You can’t use the VGA and HDMI ports at the same time. If you have a VGA   cable and HDMI cable connected to your monitor and hub when you turn on your   computer, the HDMI port will be used.

The last video connection will be used. For example, if   you have an HDMI connector plugged into the HDMI port on your hub, then plug   into the VGA port with another cable, the VGA connection will be used. If you   wanted to use the HDMI connection again, you could unplug the HDMI connector   from your hub, then plug it back in.

Use HDMI if you have a choice. You’ll get a higher-resolution   display.

4. USB 3.2 Gen 2 (10 Gbps)

Transfer large files to a USB flash drive or hard drive, connect a USB   printer, mouse, keyboard and more.

Notes:

When the hub is plugged into a 5V/3A (15W) USB-C port on your PC, you   can use the USB port and USB-C port at the same time. Both ports can support   USB 3.2 Gen 2 speeds (10 Gbps).

When the hub is connected to a 5V/1.5A (7.5W) USB-C port on your PC,   you can only use one USB port at a time. The maximum speed for the USB port   or USB-C port is limited to USB 2.0 (480 Mbps).

When the hub is connected to a computer or other device that has a   USB-C port that’s lower than 5V/1.5A (7.5W), the USB port is limited   to USB 2.0 (480 Mbps) and the USB-C port on the hub can’t be used.

To find out how much power the USB-C port on your PC supports, check   the PC manufacturer’s website for the model you have. Most Surface   devices have 15W USB-C ports. However, some Surface devices only have a 7.5W   USB-C port (for example, Surface Go).

5. USB-C

Connect devices that use USB-C. For example, use a USB-C flash drive,   USB-C hard drive, charge a mobile phone, and more.

Notes:

The USB-C port doesn’t support video out or laptop charging, so you   won’t be able to use it to connect to an external display or to charge your   PC.

When you use either USB port to charge a mobile device, the amount of   power that’s output when charging depends on the USB-C port that the hub is   plugged into on your computer or other device.

If the USB-C port on your computer is 15W, each USB port (USB and   USB-C) can output 4.5W for charging.

If the USB-C port on your computer is 7.5W, one USB port (either USB   or USB-C) can output 2.5W for charging.

If the USB-C port on your computer or other device is less than 7.5W,   you won’t be able to charge a mobile device using either USB port.

6. USB cable storage

Store the USB cable while you’re traveling. There’s a magnet in the   hole that attaches to the USB-C connector to help keep the USB cable in   place.