Monoprice Mini DisplayPort 1.2a / Thunderbolt to 4K HDMI Passive Adapter, White (112794) Conforms to DisplayPort 1.2a standard Connects to both Mini DisplayPort and Thunderbolt video outputs Supports HDMI resolutions up to 4K (3840x2160p @30Hz) PASSIVE adapter is NOT compatible with NVidia Surround or AMD Eyefinity modes