I got a new laptop (ThinkPad X1 Carbon) but it only has one USB-C port. I also have a USB-C portable monitor (Asus ZenScreen) that gets its power and data through the single port USB-C connection to the laptop.

So now I have both devices sucking battery life with no way for me to provide external power.

There are plenty of USB-C hubs that can pass power through to the laptop, while also providing signal output, though it seems only to full VGA, HDMI, DisplayPort outputs, none that have USB-C output....

Is this a limitation of the USB specification?
Or is it a rare use-case and not enough vendors out there building such hubs?

1 Answer 1


EDIT 7/5/2020: It has been brought to my attention that this device only supports audio.

I think a device like this 'Twinkk USB C Splitter' is what you're looking for.

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It costs $15.99 and allows you to charge your device while also plugging in a data connection (In this case, your ASUS Zenscreen) at the same time.

  • The comments for this product on Amazon state that it does not work for video. Jun 25, 2020 at 1:23

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