SHOCK NO HARM FOR YOUR DOG-Tired of those painful shock collars that not only don't work but cause pain to your dog? This bark collar extremely effective, training you dog with vibration warning. NO BARK TRAINING WITH 7 PROGRESSIVE SENSITIVITY LEVELS-Making sure your dog stops barking ethically and humanely is our top priority. How the levels work: At the first bark and second bark, the dog bark collar will send out a warning tone. When dog barks the 3rd time bark collar will send out a warning tone plus vibration. vibration intensity will increase each time from 3-7. The bark control collar will automatically stop working for 1 minute after the 7th correction level and then reset. FOR DOGS WEIGHING 5-120LBS: Whether your dog is a small dog or a large dog, our high quality nylon adjustable dog collar should fit them just fine. This bark collar fits breeds that have a neck circumference between 8.34in to 24.5in, with two V6 Battery 100% SATISFACTION AND MONEY BACK GUARANTEE: Our missing is to provide you a high quality of dog training collar without harming or shocking your fur baby. We are provide 100% full satisfaction with our bark collar. If your not completely satisfied with your anti-bark control collar, we will refund you the full purchase price with no questions asked.