2 PACK Auto Odor Eliminator Control System Car Bomb Tobacco Smell StarBrite Fast Release "NosGuard SG Auto Odor Eliminator" Formula begins working immediately to eliminate foul odors caused by mold, mildew, pets, food, smoke and more Quick-release, deep penetrating vapor eliminates tough odors within 4-6 hours; doesn't just cover them up Each patented CLO2 chlorine dioxide generator pouch treats one vehicle safely and quickly Professional strength treatment for removing even the toughest smoke odors Not a perfume or fragrance; air out vehicle after treatment