Kills fleas, flea eggs, flea larvae, ticks, tick nymphs and tick larvae;Kills and repels mosquitoes that may transmit heartworm;The Smart Shieldﾃつｮ Applicator, specially designed to make applying flea and tick control easier;Available in 1, 3 and 6 month applicator packs* (* is not available in refill packs);Fast-drying formula works with the biology of your dog by spreading through the oils of his skin