Fast Charging: The USB-C port supports a maximum power output of 20W. Usb c charging block offers fast and efficient charging up to 3X faster than a 5W charger block. Charge your iPhone devices from 0% to 50% in just 30 minutes. Multiport ChargingThe charger block has Dual USB-C ports and Dual USB-A ports. Allow users to charge phone, tablet and headphones simultaneously to minimize waiting time. Its also a great space saver instead of taking up 4 wall outlet ports. The best replacement for your original usb charger.