RPi5-PWR-27W-USB-C

This is the official Raspberry Pi5 power supply. It delivers 5.1A @5V and allows RPi5 to deliver up to 1.6A to it's USB ports so you can attach external drives and other power hungry pripherals. This adapter delivers maximal power with less than 100mV noise ripples which is important if you want to attach hard drives nVM etc. There are lot of Chinese similar adapters but they have noise ripples over 200-300mV which may affect reliablity of the attached external peripherals.