✅ RISK-FREE PURCHASE: We at PetKing, proud to introduce effective, high-quality anti-barking collar. We are sertain that this device will make the difference but if for any reason you are not satisfied with your purchase within 30 days, please contact us so we can make it right for you! ✅ AUTOMATIC LEARNING – it is designed to stop your dog’s barking without any human interaction. Set the desired sensitivity level and let it do the rest of the work! ✅ SAFE & HUMANE – stop unwanted behavior. No harm to your dog with an advanced anti bark collar.