The Super Mini E Cigarette (Model RN4081) is comprised of a microcomputer controlled battery, an atomizer and a cartridge, which closely resembles a tobacco cigarettes when assembled.  It even has an LED on the end which looks like glowing ember when the cigarette is in use.  When you inhale, the atomizer is engaged and the indicator light (LED) will glow.  When you stop inhaling, the atomizer will turn to stand by mode. Everything you need to get started is included except liquid: 2 Complete Super Mini E Cigarettes, 2 Atomizers, 2 Batteries, 1 USA Wall Charger and 5 Blank Cartridges.

User Manual available online.