The st7320usbc 6 port usb 3020 combo hub features a special high output dedicated charging port which enables you to charge usb devices by providing up to 2a of power or it can add 2x usb 30 and 4x usb 20 ports to a computer through a single usb 30 host connection the hub includes an external power adapter which when connected enables charging some portable electronic devices eg an iphone or other smartphone even without a usb connection to a host computer offering a unique design that feature