Use the bank to charge a MacBook Pro in 50 minutes when used as a wall charger. And you can charge an iPhone to 50% battery capacity in 30 minutes when used as a power bank (charged but not plugged in as it charges other gadgets).
Either of those devices would use one of the two USB-C ports, each offering a max of 65W plugged in and 30W unplugged. There is one USB-A port for other devices, too, like an earbuds charging case. It delivers 22.5W in either mode.