One of the most cost-effective dual-screen portable monitor in 2024 

GTMedia Mate X, This portable dual-screen monitor
*11.6 inches IPS FHD screen ,1920*1080 resolution
*Two Type-C full-featured ports, support Display Port Alt Mode
*Built-in dual speakers make the sound clearer and louder
*Support 13.1-17.3 inches laptop
*Support most smartphones/computers/laptops/SLR camera/iPad/Xbox Series X(S)/Play Station5(4)/Nintendo, etc.