Extend the computer's usb c port to a HDMI 4K output port,a USB 3.0 port and a USB-C charging port.Plug and play,No driver or external app needed.3 ports can work at the same time,easily fulfill your daily needs. Providing up to 5Gbps data transmission speed by usb to usb c adapter,that’s fast enough to transfer images,files and HD videos in seconds.Compatible with USB flash drives,mice,keyboards,or other USB 2.0/USB 3.0 devices. The usb c adapter support up to 100W power transmission,can speed up charging.You can also charge your laptops/tablets/phones conveniently and quickly when you using other ports.