This breakout will be handy for projects where you need a lot more than 5V @ 2A power: this adapter can give up to 20V at 5A - yes you can get 100W over USB C! - and you could buck that down to get a ton of current at 5V or 12V if that's needed. Jumper-configured usage is simple: by default its hard-wired for 5V 1A output since that's what USB C will always provide at first. Cut the 5V jumper and solder closed the 9V, 12V, 15V, 18V or 20V jumper to select the resistor that sets the voltage. You can also select the desired current from 2A to 3A, although we have found that this isn't as essential, you could always just pull as much as the adapter will provide. I2C-configured usage is a little more challenging, please see the detailed instructions in user guide.
User guide