This article explains how to connect an HDMI monitor to the USB-C port on the EloPOS unit, you will need to use a USB-C to HDMI adapter

Elo has qualified the USB-C to HDMI adapters listed below:

• Uni USB-C to HDMI Cable (4K@60Hz) – 3ft/6ft
• Cable Creations USB-C to HDMI cable (4K@60Hz) – 6ft
• Cable Matters USB-C to HDMI cable (4K@60Hz) – 6ft
• UGREEN USB-C to HDMI cable (4K@60Hz) – 6ft

Please go to your local retailers to purchase these cables.

In addition, for this configuration please enter the BIOS menu and select Advanced → USB Configuration → USB type C setting. Then change the setting to DP 4 Lanes + USB 2.0 to make USB-C to HDMI adapter work.