This fridge deodorizer utilizes the 03 technology. When odors, bacteria, viruses, or molds meet 03, oxidation reactions occur and then reverts back to oxygen. It will also extend your food's lifespan and double the shelf life of fruits and veggies. This home smart gadget is scientifically tested to be safe and pollution-free for expecting mothers, babies and pets. Safe and 100% effective! The power mode can remove strong odors in 30 min. and the standard mode keeps food fresh and keep the air clean. For large-capacity refrigerators or spaces, it is recommended to use more than one deodorizer at the same time to get better deodorizing. It is small and compact at 4.92 x 1.3 x 1.3 inches and weighs less than 1 pound. A buckle is included so it can be hung, if wanted, and so is a charging cable.