Dog Silencer Pro - Amazon Pack: Stop Yours Or the Neighbor&rsquo;s Dog Barking Works 3X Farther Than Competitors: Detects Barking Up To 75ft Away, Ultrasound Travels Up To 300ft Safe & Humane  Trusted By Dog Trainers, Kennel Owners, & Customers Worldwide Use Indoors or Outdoors. Powered by 9V Battery or Included AC Adaptor 45 Day Money Back Guarantee & 1 Year Manufacturers Warranty Includes the Dog Silencer Pro, Remote Control, AC Adapter, Rain Jacket & 60 Foot Extension