This product can kill 98-100 % fleas and ticks within 24 hours, and maintain the effect for 1-3 months. Raining or bathing can not weaken the effect, and the product is very safe for pets. Regularly spraying this product in home can remove all fleas and their eggs on the pets and in the environment. This product can help you prevent the transmission among pets, and keep clean living environment for pets, which can maintain pets' hair shiny , bright and bearing fresh and pleasant aroma.