USB Micro-B to USB-C Adapter
Converts the output connector on a micro USB type B power supply to USB-C.
This small adapter allows you to convert an existing micro USB power supply (like the official Raspberry Pi universal power supply for Raspberry Pi 1, 2 and 3) into a USB-C power supply.
Note that when a micro USB power supply is used, the maximum power that can be delivered to the Raspberry Pi 4 will be 12.5W. This means that less power will be available to devices connected to the USB 2.0 and USB 3.0 ports on the Raspberry Pi 4 than when using the new Raspberry Pi 15.3W USB-C power supply.