<p><b>Function & Advantages </b></p> <p>Stop excessive, noisy dog barking by emitting an ultrasonic sound to silence the dog. More effective than old version deterrents and waterproof. </p> <p><br></p> <p></p> <p><b>FOR DOGS OF ANY SIZE </b></p> <p>Uses high-frequency sound that works to reduce excessive bark of any size dogs within hearing range </p> <p><br></p> <p></p> <p><b>WELL-DESIGNED MINI SHAPE </b></p> <p>Can be hung on a tree, indoor, outdoor wall or fence post to stop any dogs barking(within range) </p> <p></p> <p>Package Contents: </p> <p>1 X ultrasonic bark controller (battery not included)</p> <p>1 X user manual</p>