This adapter enables you to mirror your Mac's display to an HDMI-capable TV or display.
iPad Pro 11-inch, iPad Pro 12.9-inch (3rd Generation), MacBook Pro (15-inch, 2017 and later), iMac (Retina 5K, 27-inch, 2017 and later), iMac (Retina 4K, 21.5-inch, 2017 and later), and iMac Pro support 3840 x 2160 at 60 frames per second (2018).
MacBook Pro (13-inch, 2016 and after), MacBook Pro (15-inch, 2016), iMac (non-Retina, 21.5-inch, 2017), and Mac mini support 1080p at 60Hz or UHD (3840 by 2160) at 30Hz (2018).
Connect the adapter to a USB Type-C or Thunderbolt 3 (USB Type-C) port on your Mac or iPad Pro, followed by an HDMI connection to your TV or projector (sold separately).
Use a USB cord to sync and charge your iOS devices. You can also use the USB Type-C port to charge your Mac or iPad Pro by connecting a charging cable.
Apple USB Type-C Digital AV Multiport Adapter