USB 3.1 Gen 1 USB-C to HDMI 4K Adapter, USB-A/USB-C PD Charging Ports, 3", WhiteExpands the potential of your tablet, laptop, Chromebook, MacBook, smartphone or PC's USB C or Thunderbolt 3 port. It's ideal for transmitting video to a large display and powering and charging a PD Charging compliant mobile deviceall at the same time. With a source device that also supports USB DisplayPort Alternate Mode, you can extend video from your primary display to another, duplicate the same video on both displays, or change the second display