This particular adaptor can support a 4k output and is very portable.
It’s small enough to toss in a bag and be on your way.
You will have to see to it your rig supports display mind you.
That’s important as some older Android phones, especially the Pixels before the 8 do not.
USB-C to HDMI adaptors are handy to have lying around the home or office.
Plus, you never know if the price will drop this low again.