"Bird-X Peller Pro V2 helps you eliminate bird problems effectively and easily with natural sonic bird control. It's a safe, humane and eco-friendly way to get rid of pest birds in outdoor areas. AC-powered and easy to use. Works well against crows, blackbirds, grackles, cormorants and ravens. Covers up to one acre. U.S.A. Battery Included No, Mounting Type Standalone, post, building, Common Usage Bird repellent, Assembly Required No, Auto On/Off Yes, Battery Type 12V, Color Green, Dimensions L x W x H in. 6 x 9 x 4, Material Type Plastic, Includes Power adapter. Species-specific settings accurately target your particular pest birds Includes predator sounds Covers up to one acre Day/night/24-hour operation settings with built-in photocell Eliminates messes and damage caused by birds Reduces health and liability risks associated with bird infestation by prevent the spread of bird-borne diseases such as West Nile, Salmonella and E. Coli Elminates fire hazards caused by bird nests in vents and chimneys Helps meet government and safety regulations"