1. Safe and effective ultrasonic dog stop barking - optimal distance of 20 feet, maximum distance of 50 feet, effective range dog barking control device, speed up 3 times behavior modification, attract pet attention and deter misbehavior.2. Stop the behavior in seconds - See it in action - This dog deterrent effectively and painlessly changes every annoying, destructive and unsafe behavior in 3 seconds. Ideal training tool for any dog from 6 months to 8 years old that barks, chews, bites, chases, jumps, digs or eats dangerous objects.3. Powerful and easy to use - Barking control not only trains your dog, but also prevents other dogs from approaching you while walking, jogging or biking. When your dog barks or approaches you, just press a button and the dog will stop its bad behavior. Four taps can be switched between two frequency modes.4. Safe night activities - The dog barking stopper is equipped with flash mode and hand-held lighting mode to ensure visibility at night and maximum safety during training. Press the side switch to enter lighting mode.5.100% Love it - and agree that it's the best training tool available anywhere in the world, or we'll offer a full, fast, friendly refund with no strings attached. We are sure you will love this advanced ultrasonic dog barking deterrent with its stylish, compact design; Great features, fast charging capabilities, and most importantly - how does it help your dog happily learn how to fit into family life - without any shock, frustration or distress