3 month's supply in one box. Topical ALL-Natural preventative. For use on cats ONLY of all weights and over 12 weeks of age. Kills & Repels Fleas, Ticks & Mosquitoes. Kills flea eggs. Each application protects your pet for up to 1 month. Water Resistant. Safe around your children and other pets. NOT a pesticide like many preventatives. Keep you home clean of pests, your pet safe and you don't even have to use dangerous pesticides, like so many other preventative products. So many other preventatives come with severe neurological warnings that may maim or even kill your best fur friend. A new kinder way to live with indoor pets.