The interfaces are converted to each other,which can power products with Type C interfaces,only supporting 5V3A power supply,and can also power product with 5.5x2.1mm interfaces The of the poweradapter at both ends needs to be the same as the of the device in order to be used normally.Do not use two different voltages for connection to avoid damaging the equipment Widely used for small fan,desklamp,solar panel,USB power pack,power adapter... This TypeC 5521 Connector is a accessory that allows you to your TypeC product or 5.5x2.1mm product with ease. It is perfect for students,workers,and travelerswho need to their devices on the go.