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 ...

Also: 5 Chromecast features you're not using enough on your TV (including a smart home buff) All streaming devices connect directly to TVs via HDMI ports to function, but some can be powered by USB.

Also: 5 Chromecast features you're not using enough on your TV (including a smart home buff) All streaming devices connect directly to TVs via HDMI ports to function, but some can be powered by USB.