The usb3c hdmicab wpd is a usb c to hdmi adapter with a usb c charging port it is designed to transmit signals from usb c computers to hdmi monitorstvs 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 simultaneously it can work on macbooks or googles new chromebook pixel as well as other usb c supported devices