Asus PN61 Series User Manual page 21

To connect a display panel to your Mini PC:
Connect one end of an HDMI, VGA, DisplayPort, or a Thunderbolt 3 cable to
an external display, and the other end of the cable to your Mini PC's HDMI
port, VGA port, DisplayPort, or Thunderbolt 3 port.
Connect display via VGA port
Connect display via HDMI port
PN61 Series 21