Most of the reviewers below said they couldn't get 4k resolution. The main problem is that your PC/Mac supports 4k resolution and your HDMI adapter/cable supports 4k resolution. I had a problem with my HDMI adapter and couldn't get 4k resolution. As soon as I switched to another I had fantastic 4k resolution.
LG 27MP59G-P 27 inch Monitor with FreeSync, 75Hz Refresh Rate, and 1080p HD Resolution
93 Review
Dell SE2416HX Screen LED Lit Monitor 23.8", 1920X1080P, HDMI
93 Review
Dell E2318Hx LED Lit Monitor: High-Definition Display with Flicker-Free Technology and IPS Panel
109 Review
Dell SE2216HV LED 💻 Monitor with 60Hz Refresh Rate
101 Review
💻 Get Amazing Video Quality with Logitech HD Pro Webcam C920 (Discontinued Edition)
83 Review
Apple AirPods Pro MagSafe RU Wireless Headphones, White
159 Review
Logitech HD Webcam C270: Crisp 720p Widescreen Video Calling & Recording (960-000694), Lightweight and Portable at 3.15 lb.
192 Review
Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review