Review on 🔌 Plugable USB C to HDMI Multiport Adapter: 3-in-1 USB C Hub with 4K HDMI Output, USB 3.0, USB-C Charging Port. Compatible with MacBook, Chromebook, Dell XPS, Thunderbolt 3 & More by James Nielsen

Works with my HP Specter 13 inch. on a 24" LG 4k display. Just plug it in and it automatically selected 4k resolution and worked fine. Refreshing at 30Hz worked, although HP can run at 60Hz. Keep in mind that some USB-A type ports 3.0 or multiport adapters can't handle 4k on their own, USB C seems to handle it better, be sure to check the adapter and connector specs.