The Scarecrow Spray Away Motion Activated Deer and Animal Repeller is used to deter unwanted animals from your selected area. When deer and other damage causing animals move within the range of the passive infrared sensor the Scarecrow Spray Away Motion Activated Deer and Animal Repeller releases a 3 second burst of water. The sensitivity of the passive infrared sensor can be adjusted for detection up to 35 feet out and 45 feet across. The 3 second water burst can cover the same area (1,000 square feet). This repeller requires a garden hose hookup and one 9 volt battery. Works for up to 4 months on a single battery. Measures approximately 15 inches above ground, head is 2-1/2 inch x 7 inch.Comes with a 2 year limited manufactures warranty.