• Multi-purpose O3 generator: smart air purifier that reduces odors in enclosed spaces like refrigerators, freezers, closets, cars, and more. Extends the shelf life of food by reducing spoilage. • Effective deodorization: eliminates odors in refrigerators by circulating active oxygen to the farthest corners. You'll notice how clean your refrigerator smells in just a few hours. • Economical choice: no consumables or filters, USB rechargeable and automatic. Saves time and money by requiring no maintenance. • LED display: easy to use with standard mode (30 days of battery) and strong mode (5 days of battery). Shows operating mode and battery level. • Compact size: portable, lightweight (93 g), and space-saving. Dimensions of 128 x 37 x 30 mm, fits anywhere.