Paipaitek Anti Bark Collar for Large Dogs, Automatic Dog Bark Collar with 5 Adjustable Levels, Humane, Rechargeable, WaterproofIntelligent Bark Detection Automatically recognizes your dogs unique bark and filters out background noise, ensuring the Paipaitek dog bark collar for large dogs only activates when needed. Progressive Training System Features 7 training levels that start with warning sounds and progress to static feedback, helping dogs learn quickly and effectively without confusion. Adjustable Sensitivity Five sensitivity levels allow you to customize the response