[Upgraded - New Tech] Unique pavilion shape design, stop excessive, noisy dog barking by emitting an ultrasonic sound to silence the dog. More effective than old version deterrents and waterproof. [High Function & Effective]: Ultrasonic Anti Barking Repellent is effective range of up to 50 feet. And there are 3 range levels and a test mode, you can use the test mode to verify the microphone and speaker are working properly. [Pet & Human Safe] The ultrasonic frequency is not harmful to pets and completely inaudible to human ears yet safe and effective training tool for your dog or the neighbors dog to disrupt the barking. Effective on most dogs within range (some dogs may not be responsive to ultrasonic correction). [Cute Design, Easy to Use] Pavilion shape, durable and waterproof, great for outdoor use, easy to hang on a tree, wall or fence post etc. Add some style to your outdoor decor that brings serenity to your family and your neighbors at home and during camping trips. [100% Satisfaction Guarantee] If you are not completely satisfied with our Anti Barking Device just contact us, we will try our best to give you a satisfactory solution!