Enjoy all your favorite outdoor activities mosquito-free! These handy Personal Repellers from Emerson emit an electronic barrier that drives mosquitoes, gnats, flies and other biting insects away. Simply slip one in your pocket or clip one to your belt or key chain. They also have a bright LED flashlight. Chemical-free, so they're safe for children and pets too. Requires 4 button cell batteries (included FREE). 2-1/2"L. Set of 3.