That’s correct 
It is a hardware device you attach to your mobile device! They developed hardware and it snaps onto your phone or in this case tablet (nvidia shield I believe?) It is pretty awesome, the time to produce this whole image was very little. I’m actually not sure how long it took to scan the cave but to scan my body only took about 30 seconds so I imagine a couple hours to scan the cave. It’s 1 million polys.