This adapter is designed to allow you to connect an HDMI display to a Mini DisplayPort or Thunderbolt video output. It conforms to the DisplayPort 1.2 a standard and supports HDMI resolutions up to 4K (3840x2160p) @60Hz. It features a true 6 inch cable length with polycarbonate connector heads. The MDP connector head measures 14.0 mm thick, 16.0 mm wide, and 24.0 mm long. The HDMI connector head measures 17.5 mm thick, 27.5 mm wide, and 47.0 mm long.