Anti Bark Collar trains your dog not to bark, ensuring a more peaceful environment for you, your family and your neighbors. High-quality electronic anti-bark dog collar and sends harmless warning sound and shock to the dog whenever it barks. 7 sensitivity levels (1-7) adjustable for the different size of dogs barking and specific environments through the '+' /'-' button. The stimulations repeat through 7 correction levels, the intensity gradually increases until the dog stops for thirty seconds. Effective on a 15-120 pounds dog Satisfaction guaranteed. Backed by a 100%, no hassle money back guarantee if you are not completely satisfied.