... other carcinogenic substance.<2> Harmless to others and the environment. With no danger of second-hand smoking.<3>Smoke in public places ... the smoking cost of nearly 80% each year.<6> No ignition and no fire danger.<7>Convenient,durable,practical and smart<8 ... C-TRA.Feature: 1.No second hand smoke, no harmful tobacco;2.No carbon monoxide, no odor, no tar, no ash. no risk of fire.3.Using ...