The USB-C to 3.5mm Headphone Jack Adapter lets you connect devices that use a standard 3.5mm audio plug like headphones or speakers to your USB-C devices.
The USB-C Digital AV Multiport Adapter lets you connect your USB-C-enabled Mac or iPad to an HDMI display, while also connecting a standard USB device and a USB-C charging cable.
This adapter allows you to mirror your Mac or iPad display to your HDMI-enabled TV or display.