The NPRO™ 2N1 Deluxe Burgundy Starter Kit includes everything you need to start NJOYing electronic cigarettes today! What makes the NPRO™ 2N1 different from most electronic cigarettes, you ask? Each 2N1 replacement cartridge comes equipped with its own atomizer and delivers about three times as many puffs as the original NJOY® cartridges. The atomizer is extremely important because it is the heating element, which is to say, the 'electronic' component of electronic cigarettes. With many other brands and even previous NJOY® models, the atomizer is fixed to the battery rather than the cartridges. Such atomizers are often times not even replaceable, rendering the entire product useless in the event of an atomizer casualty.