No.2 Warehouse Air Purifier Ionizer for Refrigerator Closet /Wardrobe/shoebox (LF-002) + a Piece of Clean Cloth Air Purifier Ionizer for Refrigerator Closet /Wardrobe/shoebox Improves air quality Eliminates food odors in your refrigerator Keeps food, vegetable and fruit fresh, Reduces food spoilage Powered by 4 x AA batteries(not include), Working time: 10 secs; Stand by time: 30 mins cyclic model