It's very clearly not an electrical device. Parts are hollow... gas, perhaps?

There's not much here. Screens, crude furnishings, the stone she sensed from outside, the omnipresent glowing insects. Windows, made of clear crystal. Kuvira goes to one. "There's a balcony," she says. "Apparently it's possible to go outside without passing that webbing below."

They seem to be a good ways up, and there's not much to see. Mostly cold-affected giant grasses, and the fog.