Gotek Smart Fridge Deodorizer & Sterilizer uses ozone and negative ion dual modes to kill 96.2% of bacteria and provide a healthy environment for food storage and preservation. Eliminating bacteria, it is a much more efficient deodorizer than old-fashioned charcoal deodorizers based on passive adsorption. Not only does it help to keep your refrigerator smelling fresh, but it also extends the lifespan of food. It doubles the shelf life of fruits and vegetables and also speeds up the degradation of potential pesticide residue. With ozone concentration less than 0.018 ppm, it is totally safe for the environment and has zero nitrogen oxide residue. And if that's not good enough, this amazing 2,600mAh deodorizer is rechargeable, providing 90 consecutive days of working time.