About this item:USB C 3-in-1 Adapter - Expands computer ports into an HDMI 4K output port, a USB 3.0 port, and a USB-C charging port. Three ports can work at the same time. Lightweight, plug and play, no extra driver needed. The slim and portable design with an aluminum body provides better heat dissipation.4K UHD HDMI PORT - The USB C to HDMI adapter supports mirroring or extending your phone/laptop