Review on 4K / 30Hz USB-C to HDMI Adapter - 3-in-1 Type-C Converter Cable for MacBook Pro, MacBook, Mac Pro, iMac, Chromebook, and USB 3.0 Type-C Devices (2017/2018) by Jerry Forehand

Unfortunately you have to give at least one star for the rating. This product is waste of money. I ordered it for my daughter, who got a MacBook Pro for college, and oddly it didn't even have a USB port - that's a whole different complaint. She tried it at home to make sure it worked before she went to college and it worked, but now that she's there and tried using it again, NOTHING. And of course the return period has already passed, so we're stuck with something that doesn't work. Like I said, waste of money!