Startechcom thunderbolt 3 to dual hdmi adapter 4k 30hz windows only compatible use a thunderbolt 3 port on your windows system to run resource demanding applications on two uhd 4k displays connect two uhd 4k displays to your computer through a single thunderbolt 3 port run resource demanding applications on 4k displays at 30 hz without draining system resources thunderbolt certified backward compatible with lower resolutions like high definition 1920x1200 and 1080p no external power