For use on cats 5 lbs. and over. 3 months supply. Kills fleas, deer ticks and flea eggs; Kills mosquitoes for up to 1 month. Easy squeeze tube. Kills deer ticks for up to 1 month; Protect your cat from deer ticks that may transmit Lyme disease; Kills and repels mosquitoes; Kills mosquitoes that may transmit heartworm disease; Kills fleas that may cause flea allergy dermatitis, flea bite anemia and tapeworm infestation; Kills flea eggs for up to 1 month; Quick acting, long lasting. Read entire label before use. Use only on cats or kittens 12 weeks of age and older. Hartz UltraGuard plus Drops For cats is a topically applied long-lasting, product specially formulated for cats and kittens containing an insect growth regulator (IGR) which prevents flea eggs from maturing into biting adults. It also contains the highly effective flea, deer tick and mosquito killing agent Etofenprox, which kills biting adult fleas, deer ticks and mosquitoes your cat may acquire from its surroundings. A single application of Hartz UltraGuard plus Drops For Cats will provide egg hatch inhibition for up to 4 weeks. Each package contains enough product for 3 monthly applications. Hartz UltraGuard plus Drops For Cats provides relief from flea infestations for up to 4 weeks by killing adult fleas on your cat or kitten and flea eggs in your home. Adult fleas can live on your pet while producing vast numbers of eggs, which drop off your pet and develop in the surrounding environment. Normally insecticides will not kill the flea eggs, but Hartz UltraGuard plus Drops For cats kills adult fleas and flea eggs, breaking the flea life cycle and providing your cat relief from flea bites at the same time. After application, your cat's natural skin oils disperse Harts UltraGuard plus Drops For Cats over your cat's body for protection against biting adult fleas and development of flea eggs. Once adult fleas are evident on your cat, ther is likely an infestation of flea eggs and larvae in your home, or in your yard. Hartz UltraGuard plus Drops For Cats can be used in conjunction with other, Hartz premise products. As with all products, they are most effective when used as part of a total program aimed at reducing all stages of fleas in the cat's environment. They are designed to complement each other in an integrated program for flea, deer tick, and mosquito management.