DOG BARKING CONTROL DEVICESDog Bark control device emits an ultrasound sound to stop excessive, noisy dog barking. Ultrasonic bark control device can be used as a training device, which can train your dog to be obedient and develop good behavior. Only the dog barking control devices we sell with storage bag have after-sales and warranty, and the rest sellers are negative.ADJUSTABLE FREQUENCYUltrasonic Dog barking control device has 3 range levels and 1 test mode: Low (15 feet), Medium (30 feet), High (50 feet). For different cases, we recommend adopting different frequencies to make this dog bark control device perform optimally.OPTIMAL CONDITIONDesigned for outdoor use, weather conditions will not affect the performance of dog barking control devices. But we don't recommend soaking it in water for a long time, because the water vapor will cause the internal electronics of the dog bark control device to rust.HUMANEThe ultrasonic frequency of outdoor anti barking device is aimed at pets and inaudible to human ears. No electric shock, no need to take anything, no barking device can prevent your dog or neighbor's dog from barking. Dog barking control device is effective for most dogs in the range. The type of dog may behave differently on the frequency chosen.EASY TO OPERATIONThe dog barking control devices come with a well-designed mini shape. Hanging or mounting on a tree, wall or fence post to keep your own dog or your neighbors dog from barking. Remove the battery or turn off the dog barking control device when not in use for a long time.