Guten Dog Advanced Bark Training Shock Collar with 7 Levels Sensitivity Control Our 3rd Generation Advanced Bark Training Collar will train your dog not to bark SAFELY and HUMANELY Most dogs will see improvement within minutes of wearing! Train your pup to appropriate times of barking. Guten Dog Advanced Bark Training Collar sends dynamic levels of shock to deter excessive barking LONGEST WARRANTY ON THE MARKET! We stand behind our collars with a 2 year limited warranty. A portion of our proceeds is donated to pet charities and organizations. We welcome your recommendation for charities in need!