Once the aluminum package is open, air purifier patch immediately reacts to harmful agents in the air and restrains the multiplication of bacteria, mold, and germs. It is a powerful sterilizer and deodorant, and has an effective range of 6.56 ft (2 meters) in all directions. Air Purifier Patch eliminates harmful bacteria and germs in the air up to 99.9% to help prevent viruses. For more details visit https://ussaviors.com/pages/savior-virus-patch