The portable monitor is a lightweight, external display device that is usually ultra-thin, has a built-in battery, or is powered by USB or HDMI. Portable monitors are often used to expand the display space of laptops, smartphones, gaming devices, and other devices, allowing users to perform multi-screen operations, displays, and entertainment in various scenarios. The size is usually between 13″ and 17″, with 15.6 inches being the most common. Most portable monitors support 1080p (1920×1080) full HD resolution, and are flexible, convenient, and plug-and-play, making them convenient for people who need entertainment, expanded display, mobile office, and multitasking scenarios.