The single-speaker version of our original GooseBuster is here! This unique system was developed using decades of scientific research involving the behaviors & vocal communications of Canada geese. This system employs authentic goose alert & alarm calls recorded in the wild & are still the only such recordings in existence. Extremely effective in reducing & eliminating geese Audio makes areas uninhabitable for geese Geese learn not to return through behavior modification Customizable settings, completely humane Covers up to 1.5 acre per unit; pairing units covers 4-6 acres. Effective coverage up to one & a half (1.5) acres (43,560 sq ft; or cover up to 4-6 acres with 2 units). Recommended for large, outdoor spaces experiencing goose problems. Effectively Repels: Geese, Ducks, Other Waterfowl. Ideal For Use At: Large yards, homes, ponds. Parks, ponds, & other waterfront property. Golf Courses, Parks & Small Lakes. Corporate Grounds, Large Yards & Lawns. Large Estates & Condo Property. Corporate, Hospital, & School Campuses. Boats, Harbors, Marinas, & Docks. Parking Lots & Large Open Spaces. Farms, Barns, Stables, & Sheds. Sonic Goose Repellent System. Developed with Decades of Research. Eliminates Goose Problems Outdoors. Money-Back Guarantee. Specifications: Dimensions: Control Unit 6" x 6" x 3.5", Speakers 5.5" x 5.5" x 5". Box dimensions: 12" x 9" x 7" / Shipping weight: 4 lbs. Speakers: 8 ohms, 30 watts. Power Requirements: 1 Amp 110VAC or 220VAC adaptor, or 12VDC. Cords: 110v cord is 50 ft / 220v & 240v cords are 6 ft. Sound Pressure: 0-110 dB at 1 meter (single speaker). Frequency: 500 ~ 1,500 Hz. Compliance: Supply power source is UL, CUL & CE listed. EPA Registration: EPA Est. 075130-OR-001. Body: NEMA type box.