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