The USB-C Digital AV Multiport Adapter lets you connect your MacBook with USB-C port or MacBook Pro with Thunderbolt 3 (USB-C) ports to an HDMI display, while also connecting a standard USB device and a USB-C charging cable.
Use the standard USB port to connect devices such as your flash drive or camera, or a USB cable for syncing and charging your iPhone, iPad or iPod. You can also connect a charging cable to the USB-C port to charge your MacBook or MacBook Pro.