This is a handlebar mount designed to house an Arduino Pro Micro (https://www.sparkfun.com/products/12640) and a push button switch while being mounted to a 32mm bicycle handlebar.

The purpose is to allow me to press the button and generate a certain USB key-press/release to trigger the push-to-talk feature on discord.

Nothing special about printing, although you will need to use supports. The channel that the Arduino sits in is (intentionally) tight, so you may have to clear out some slop depending on your printer.