1.{USB 3.1 Type C Compatibility} USB-C is a new standard with much versatility, not all USB-C devices support all of the latest USB-C protocol. For instance, a lot of laptops dont support Displayport Alternate Mode video output, while others do; A Laptop with a Type C connector does not necessarily implement Power Delivery or Alternate Mode. So, please be sure that features of the device such as Power Delivery & Alt Mode video output must be supported by your host laptop system to function. As such, this docking station is not compatible with legacy USB 3.0/"USB A" system. 2.{HDMI 4K/60Hz for Windows & Mac OS laptop} AUIMCE USB C dock supports connecting AN external display through this dual monitor Hub to a Macbook Pro (2016 or later version) or any Full-featured USB C Windows laptop at 4K/60Hz video output. Tips: NOT all USB C Windows laptop supports the Video output function, check the protocol of USB C in your laptops manual book before buying, please! Attentio