instecho Anti Barking Device, Ultrasonic Anti Barking, Sonic Bark Deterrents, Bark Control Device, Dog Bark Contrl Outdoor Birdhouse Durable and Weatherproof: Deter your own dog or your neighbour's dog from barkin Adjustable Ultrasonic Level Control: Safe for small medium large dogs. Emits harmless, but effective sound to control excessive barking Hanging Rope Included: Designed to hang/mount on a tree, wall or fence post to keep your own dog or your neighbors dog from barking. Hanging rope included Effective Range Up to 50 Feet: Outdoor Bark Control is automatically activated when it detects barks up to 50 feet away. It then emits ultrasonic sound. Device 100% safe, humane and professional way to train your dog to stop barking