A splitter allows a single peripheral to output to multiple displays.

This post was done in partnership with Wirecutter. When readers choose to buy Wirecutter's independently chosen editorial picks, Wirecutter and Engadget may earn affiliate commission. Read the full ...

These days, if you need to connect two devices via wire, you'll most likely use HDMI. This display protocol supports all sorts of device pairings. It lets you use your iPhone with an external display, ...