look like real cigarettes and usually consist of a battery, a cartridge containing nicotine (the addictive ingredient in tobacco), a solution of propylene glycol or glycerine mixed with water, and an atomiser (a device that turns the nicotine solution into a fine mist or vapour).
When someone inhales on the iSmoka Eleaf the nicotine solution is heated and evaporates.
Cartridges are available in different concentrations of nicotine, and in various flavours such as apple, chocolate, coffee and mint. Most iSmoka Eleaf
have an LED at the tip which lights up when someone inhales, in a similar way to the lit tip of a cigarette.