“Small form factor, dedicated to Pi4.
At least this is guaranteed to work, not like a normal USB-C Power supply that might not give enough power or by tricked by Pi4 non standard implementation of USB-C Power.
If you don't have a PoE HAT, this might be the best way to power a Pi4.
Waiting for this to arrive, you can use a Pi3 official power and a small convertor to go from micro to USB-C.”