Make Sure You're Buying Apple's Newer USB-C AV Adapter for Mac and iPad Pro
by Brendan Hesse from Lifehacker on (#4MZBF)

Apple has updated its USB-C Digital AV Multiport Adapter, a dongle you plug into your Mac or (newer) iPad Pro so you can connect an external display or standard USB device. The newer version of its Multiport Adapter adds support for HDMI 2.0, which includes: