Raspberry Pi Official Raspberry Pi 4 Power Adapter
This official Raspberry Pi power supply is the perfect choice for powering your new Raspberry Pi 4 Model B board. This power supply works with all versions of the Raspberry Pi 4 board, the 1GB, 2GB and 4GB. It is a 5.1V, 3A power supply with a USB-C connector at one end and a power outlet at the other end. Simply plug the USB-C into your Pi 4 and plug the power socket into the mains and you're ready to go.