“I already had a Raspberry Pi 4 Power Supply (5.1V 3A), which was supplied with my RP400. I bought a tft display monitor to use with it, which did not come with a power supply. Using a regular USB c phone charger the screen often flashed due to inadequate power. When I tried the 3A RPi supply it was sufficient. At a much better price than any other alternative it made sense to buy this to power both the PI400 and monitor. Very hahhp, thank you.”