(Uni-directional: from Mini DP to HDMI only) Output video FROM a mini Displayport or Thunderbolt 2 port TO an external display. (Supports hi-res 4K video) Deliver ultimate viewing experience with high-resolution support of up to 4K at 60Hz while providing high-performance connectivity. (Superior construction) Constructed with double-braided exterior and aluminum alloy casing to withstand daily bends, twists, and pulls. (Reliable performance) Well-built with high-quality copper conductor and triple-braided shielding to minimizes signal interference. Please note that this product comes with a worry-free 12-months warranty. We have you covered!