"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. Common Usage Bird repellent, Auto On/Off Yes, Dimensions L x W x H in. 6 x 9 x 4, Material Type Plastic waterproof housing, Includes Power adapter, Mounting Type Standalone, mounts to post or building, Battery Type 12V, Assembly Required No, Battery Included No, Color Green. 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"