Looks like some Tech Specs for some Security Software is the
"sub-terraining support" to your layout.
They are fun. Thought of getting me one to take apart and make
it grow.
Mason Jar
I picked up two of them a few years ago, keep them in my RR curio cabinet, kids get a kick when they see them run around the track. take care if it, you don't see them around any more I haven't seen them at a train show for quite awhile.