Whether you're a traveling exec, a gamer, or a graphic designer, a portable second monitor can add an extra dimension to your work or play. We've tested most of the major models. Check out our top ...

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Best Dual-Screen Portable Monitor. 4.0 Excellent. Why We Picked It. The Asus ZenScreen Duo OLED’s signature feature is its pair of 16:10 full HD 14-inch OLED screens stacked atop one another.