Ortho Home Defense Mosquito Kill & Prevent Refill KitEnjoy your yard without the buzz and bite. This product uses the Aedes and Culex mosquitos' own behavior to kill existing ones and prevent new ones from developing, creating a 4,300 sq. ft. protection zone around your home. Key Features KILLS & PREVENTS MOSQUITOES*: Kills adult mosquitoes* within 9 days and prevents new mosquito* larvae inside the station and at other breeding sites adults visit from developing CREATES A PROTECTION ZONE: Each station