2 Pack Anti Barking Device Ultrasonic Dog Barking Deterrent Device Dog Bark Control Devices 50 ft Range for Outdoor Indoor Ultrasound Silencer No Bark Training Control Device Security for Dogs (Brown)

Working Principle: when the microphone of the dog barking deterrent device detects a barking dog, the product will automatically emit an ultrasonic wave, which is inaudible to the human ear but can be heard by the dog; In this way, it is a harsh noise to the dog, so the dog will stop barking and leave Long Lasting Works: designed for outdoor use, the barking control device is designed to look like an alarm clock and can be easily installed on a tree, wall or fence post to stop any dog from barking within range, indoors and outdoors. When using it outdoors, please make sure it is not exposed to rain to avoid damage to the device Product Features: the anti dog barking device prevents excessive barking, thus relieving you and your neighbors from the effects of noise; The product is effective in stopping barking and does not require a collar, safe and effective for all breeds and sizes of dogs Safe for Animals and Humans: this ultrasonic bark control has been tested and is less harmful to humans, animals and plants; Due to its precise sound frequency, you may not even hear it and bring you a quiet environment Effective Range: our ultrasonic bark stopper are designed for ease of use, with multiple setup requirements; The microphone can catch the bark in multiple directions; There is a low range of 15 feet, a medium range of 30 feet, and a high range of 50 feet