A. Forget about your daily troubles: While some neighbors just don't care about their yelling dog, others like you, just aren't sure what to do. So instead of suffering, why not try the Anti-Bark Ultrasonic Dog Bark Deterrent? It is the non-portable device that makes dogs more bearable by stopping their barking. B. Up To 75 Feet Effective Range: Our indoor and outdoor dog bark control devices were conveniently designed with multiple settings; multi-directional microphone picks up dogs in any direction Mode 1: low range (up to 25 feet); mode 2: medium range (up to 50 feet); is it further? Mode 3: High Range (discourages all dogs outside up to 75 feet). C. Safe and Friendly to Animals and People: This ultrasonic dog bark silencer has been tested and proven to be completely harmless to human animals and plants. Due to its precise sonic frequency, you may not even hear it. It will take up to 2 weeks for the barker to "learn" what the piercing noise means. D. It's So Easy To Use - Dog Whistle to Stop Barking. This small dog deterrent is very easy to mount on a wall to hang on a tree or place on a fence post near your house; Plus, it's extremely easy to set up and start using; making it a suitable electronic pet training for your pup. E. DURABLE AND WEATHERPROOF - Built to a certain quality level to ensure long-term use; It's waterproof and durable so you can hang it outside in any weather conditions, making it a great outdoor barking controller for dogs.