Febreze CAR cleans away vehicle odors with OdorClear Technology so they're gone for good. Simply attach this car air freshener to the air vent to begin cleaning your car of odors and slowly release a light, fresh scent for up to 30 days. * The scent dial puts you in the driver's seat, allowing you to select the perfect amount of freshness for you and your passengers. Don't give odors a ride. Eliminate them with Febreze CAR. *On low and under ambient conditions.