If I am informed correctly, HDMI 1.x only supports one screen.
The ASUS UX330UA even works with 4k / 3840x2160 with Micro HDMI to HDMI adapter.
Ev. the Lindy USB 3.1 Type C Dual Display Adapter HDMI & VGA Art-Nr 6082434 works.
"Supports output and splitting of the video signal to two monitors at the same time, one HDMI and one VGA monitor"
more info at:
http://www.lindy.ch/USB-3-1-Ty...