How to use "interface" in a sentence

Sala looked at Cham, and engaged her virtual interface.

Sala looked up at her interface

His face on her virtual interface looked worried

Cham's face appeared on her virtual interface almost at once

"Make interface pictures for us, Cham," his two younger sisters begged

Sala engaged her virtual interface and sat waiting for him.

The lights had been turned off; soon she was in complete darkness, so she turned on the lights on her virtual interface to guide her

When the ultranet interface went dead, she sat quietly for a moment