This adapter has female 5.5 x 2.1mm DC barrel jack on one end and a regular male USB-C plug on the other end at 90 degrees angle.

It is handy if you have 5V DC power supply with a barrel plug and you want to power a USB-C device.

Take note that this adapter does not do any voltage conversion. Most, if not all USB powered devices runs on 5V, be mindful of the voltage that you connect to the barrel jack.

Do not connect anything more than 5V to your USB devices!