A vaporizer pen, or vape pen for short, is called such because of its shape and size. Its size can range from a standard pen to a large cigar. They are generally used to consume e-juices, or e-liquids, through a tank although there are a wide variety of models that employ cartridges.
Vaporizer pens have three components: (1) the vape, or in some models, the cartridge, which holds the e-juice, (2) the atomizer which is the heating element that turns the e-juice into vapor, and (3) a rechargeable battery.
Due to their compact design and size, these vaporizers lack the sophisticated features and technology found in larger units such as digital displays or temperature control. They are, however, great for those who are just starting out and wanting to try the experience of vaping.