Successfully tested at the UCLA School of Microbiology, our miniature size Wearable Air Purifier can go with you anywhere - airplanes, restaurants, theaters, offices, etc. It cleans the air naturally while destroying a wide variety of airbourne pollutants. Weighs just 1.5 oz. and is no bigger than a deck of playing cards. A single nine-volt battery powers its nearly silent operation. Includes both a clip and a strap for use comfort. Size 2.5" x 1.5" x 8.5".