3 Month supply. Kills fleas, ticks & mosquitoes. Fast acting. Longer lasting. Gentle formula. Waterproof (keeps working even after you cat has been out in the rain). Easy and convenient to use. Kills and repels the Deer Tick which may carry Lyme Disease. Kills and repels mosquitoes. Kills 95% of fleas and repels 96% of ticks within 24 hours.