Electronic cigarettes work because of three simple parts: an atomizer, a cartridge, and a battery.
The cartridge contains the flavoured liquid which provides the aroma to the water vapour.
When the user inhales, the atomizer is activated and it mixes the liquid with the air. This mix becomes vapour which is inhaled by the user. The inhalation action also causes the activation of the indicator light at the end of the cigarette. Once the liquid has been completely consumed, the light indicator will stop illuminating signifying it is time to use a new EVO.