About this item USB Charging UV Built in 800mAh battery, rechargeable, USB interface can be used with a computer or mobile power. Normal mode can work continuously for 21 days; deep deodorization mode can work for 3 days (deep deodorization mode 12 hours is a working cycle, 12 hours automatic shutdown) Healthy & Reusable Ozone Generator DeodorizerUnlike other deodorizing methods, ozone actually searches out and destroys problem gases. If the molecules are stinky ones, they can change to be non-smelly aka neutral, like H2O (water) and O2(oxygen). Continuously produce ozone through electrolysis technology. Just charge it and use it. The service life is as long as 3-5 years. Refrigerator DeodorizerThe Air Purifiers is an eco-friendly design that through high technology, the oxygen in the air is converted into ozone, which can be recycled and used without invisible consumption, to keep energy consumption to the minimum. Easy to Use & Easy to Carry Our Air Purifiers can be used by clicking the power button witch charged once in 14-17 days. The Air Purifier Deodorizer has two modes to choose from cycle mode and powerful mode. Does not take up any storage space. You can take Our Ozone Generator Deodorizer wherever you want. Bring convenience to your family and life. Wide Range of UseYou can put our Air Purifiers in the refrigerator, washing machine, car, pet room, shoe cabinet, closet, bedroom, bathroom or even backpack, luggage anywhere you feel you need help. Most importantly, this is a healthy and perfect gift for family and friends.