The usb3c hdmiusb wpd is a usb c to usb 30 hdmi and usb c charging port hub the usb 30 port allows you to connect a usb device to the host computer or another hub the usb c female port can charge the host computer and supply power for the adapter at the same time the hdmi port allows you to connect an extra monitor so that you can watch videos or slideshows on the big screen it also features a usb c female port so you can charge for the host computer and supply power for the adapter s