By adopting the latest patented technique, the product can effectively remove harmful gas inside the vehicles by biodegradation technology, which is different from other air cleansers only conceal offensive odor. Thus, it is antibiotic, deodorant and can purify air thoroughly to refresh driver and passengers. Non-poisonous. No color or odor. No negative side-effects, No pollution. Eliminate harmful gas, smoke, alcohol vapor, mildew, and other odor causing bacteria inside of the vehicle immediately. Prevent the spreading of diseases. No harm to human, pets or ozonosphere. Protect environment.