The vapman is a conduction on demand butane session vaporizer. Heat the metal plate, which then conducts heat to your herb and vaporizes it. Vaporization only happens for a few seconds, and within seconds of lighting up (on demand). However, you get best performance if you take several hits back to back (session). It's got great flavor, it's relaxing and ritualistic, it's one of the best vapes I own. If you think you might like this one, you will. It's a keeper.