This acoustic bark deterrent can control the dog's barking by emitting a high ultrasonic sound. This definitely does not harm the dog or human, but only serves as a tool to train the dog to stop barking so that neither you nor your innocent neighbors are bothered. Detection range up to 15 m: the range of ultrasonic penetration is 50 ft and covers the area inside and outside. Compared to the traditional dog training device, the hands are completely free. After testing, the best effect is within 10 m. The smaller the range, the better the effect. Safe and human: This dog barking deterrent has been tested and has proven to be completely harmless to pets of all sizes. It will certainly not harm any person. Design with waterproof and high quality material, which is durable. You can use this stop bark device as bark control both outdoors and indoors. Both are completely safe. Easy and effective operation: 3 different levels can be adjusted via the buttons of the anti-barking device. Different dogs may be sensitive to ultrasound of different frequency bands, so we recommend maintaining one level for more than 2 weeks; if still useless, please switch to the next level. We value you as our customer and look forward to exceeding your expectations. If you are not satisfied with our ultrasonic bark controller, please contact us and we will try our best to provide you with a satisfactory solution! › See more product details; Product description Product Description Sonic Bark Deterrents Directions Sonic Bark Deterrents; Product description Product Description Sonic Bark Deterrents Directions Sonic Bark Deterrents; Product Description Sonic Bark Deterrents Directions Sonic Bark Deterrents Model: Size: Color: