Allow HDMI video signals to pass along a USB Type-C cable without the need to use a dongle or dock to convert the DisplayPort signals that are natively output via the Type-C standard.Some USB Type-C ports only have charging or data transfer function, NO video output function. Please make sure your USB Type-C Port has video output function and compatible with our cable or it wont work. Just plug and play, there is no need to install any drivers or additional power supply. It also obtains a fast transmission and stable signal. If you want to connect this adapter to your smartphone or tablet , please make sure your smartphone or tablet comes with DP ALT Mode(Like Lumia 950/950XL).