I don't even know what mine was. I tried one when they first came out and cost silly money. I ditched it and went back to analogs quickly.
It was long, black, quite heavy and had a blue light on the end. The battery was slightly longer than the current larger capacity ego-style batteries, but about the same diameter - maybe a touch larger. It had a cap on it much like a pen that you had to remove to have a vape, and the mouthpiece was a plastic squashed cylinder with a little hole in the end. On the inside there was a little bit of some kind of wicking material that came pre-soaked in liquid. You'd have to buy a new middle piece every time it ran out. The heating element was flat and round stuck to the end of the battery, almost like a mini cooker hob or in-car cigarette lighter that glows when hot. It was an automatic device.
So, unidentified black thing