Mini DisplayPort to HDMI Adapter - Active mDP to HDMI Video Converter - 4K 30Hz - Mini DP or Thunderbolt 1/2 Mac/PC to HDMI Monitor/TV/Display - mDP

The MDP2HD4KS Mini DisplayPort to HDMI adapter enables you to connect a mDP-equipped Ultrabook™, tablet or laptop computer, such as the ThinkPadT440

The MDP2HD4KS Mini DisplayPort to HDMI adapter enables you to connect a mDP-equipped Ultrabook, tablet or laptop computer, such as the ThinkPadT440 series, to an HDMI display. This adapter is compatible with Mini DisplayPort 1.2 and HDMI 4K @ 30 Hz and as a result can support video resolutions up to Ultra HD (4K) as well as the accompanying digital audio up to 7.1 channel surround sound.

StarTech.com Mini DisplayPort to HDMI 4K Audio - Video Converter - mDP

Monoprice Mini DisplayPort 1.2a / Thunderbolt to 4K HDMI, DVI, and VGA Passive Adapter, Black

Vention Mini DisplayPort to HDMI Cable 4K HD Mini DP to HDMI Adapter for MacBook Air PC iMac TV Projector Thunderbolt 2 to HDMI

Plugable Mini DisplayPort/Thunderbolt™ 2 to HDMI 2.0 Active Adapter – Plugable Technologies