MANY TYPES OF RODENTS: As we all know, rats/mice will prefer to enter our house in winter because it is too cold outside. Our product can usefull many types of rodents as listed below: Mole, Gopher, Groundhog, Vole, Bamboo Rats, Crested Rats and other rodents. EASE TO USE: Take out of the box and tear off the sealed plastic wrap. Then put areas of your home that mice can access, such as garages, trucks, barns, attics, autos and so on, the unpleasant smell will keep them away. Keep using our item will get a longer and better effect. USE: Total 20 ball inside the package, Added 20 green plastic bags for packaging item when in use. WORKING PRINCIPLE: Our item is made of natural essential oils: peppermint oil, rosemary oil and clove oil, it emits a smell that makes rodents feel uncomfortable to force them to leave which will help keep mice out. Use scenario: suitable for families, restaurants, hotels, office buildings, warehouses, farms, etc.