It's essentially an electric version of something like the tasty tube or the vaponic.

Inside the wood enclosure is a glass tube, wrapped with a steel coil.

The bowl is another glass tube you insert into the larger internal glass tube. The steel coil heats the internal glass which in turn heats up the bowl. The conduction heat of the hot glass vaporizes the material inside.

It's a full glass conduction experience so the vapor is dense and stoney but still super flavorful.