BENFEI USB 3.1 Type C USB-C to Mini Display Port Displayport Thunderbolt 1080p HDTV Adapter Cable with Aluminium Case for MacBook/Laptop (USB C to Mini DP) Mirror display screen of USB-C equipped device, such as new Apple MacBook, Surface Pro 4, Google New Chromebook Pixel, to HDTV or display screen, including movies and videos USB 3.1 Type C to Mini DisplayPort DP 4K UHD External Video Graphics Adapter for New 12 inch Macbook, Google new Chromebook Pixel, Surface Pro 4 and other USB 3.1 Type C supportted devices. Three option: mirror, extended or primary display by configurations in computers Support resolution up to 4K*2K or 2048*1152 or 1920*1200 Attention: when use Mini DisplayPort TO HDMI converter, the model must be active. passive will not show video