A unique & automatic fly control system. The durable aerosol dispenser sprays at fifteen minute intervals. Use with Purge III flying insect killer. Purge III is a natural pyrethrin insecticide. USDA approved and EPA registered, it is friendly to the environment and safe to use around all animals and people. Effective against flies and mosquitoes that can carry disease. One dispenser covers an approximate 10' x 20' area and can be used in or out of doors. If used outdoors, mount dispenser high and up wind from area to be covered. Purge Air fresheners and air sanitizers are sold below for use in the dispenser. Dispenser requires 2 D-cell batteries, not included. Dispenser has 2 year warranty and a money back guarantee.