If one has ever come across the problem of bad odor or foul smell in car, bedroom, toilet or any other room then surely this product will get rid of your problem by attacking the root cause of odour problem. Odor has the property of returning back after some days when it is treated by passive methods like air freshener because these methods encapsulate the odour molecules in air temporarily. Ozone plays an important role in removing the odor in air, very effective in removing pollutants and a powerful oxidant that kills organisms like bacteria, mold and viruses. While using it in car, keep the car parked in idle condition (no human or pet inside the car) and switch the unit on for 15 minutes with car ac running full blast continuously Similarly, in bedroom and toilet rooms, switch it on for 15-30 minutes with no human and pet being present in the room and switch on the ac unit (in bedroom). You will experience that the odour has been miraculously permanently eliminated from your work place with daily treatment of the unit. Please note that while operating the unit, it is strictly advised that the application area to be non occupied by human and pets.