E cigarette controls the output of smoke and working condition by high-tech silicone chip and airflow inductor. Its principle can be explained as followed. The liquor that contains nicotine and flavors firstly is atomized, and thus it can be absorbed by the lungs. The E cigarette will generate smoke which is similar to that of real cigarette. So the user almost feels no differences when smoking. However, compared with traditional cigarettes, the Electronic ones do not contain any harmful substances such as tobacco tar, carbon monoxide, carbon dioxide, hydrocyanic acid, acrolein, arsenic, lead, mercury, etc. In addition, E cigarettes will not cause so-called passive smoking. Because the nicotine comes to be aerosol after atomization, which is quickly diluted in the air and very difficult to be absorb by human. In conclusion, electronic cigarette do no harm to both the smoker and people around, and it won't cause fire and can be used in most No-smoking places.