Rechargeable Smart: Equipped With A 300Mh Lithium Battery For Long Lasting Power, With An LED Indicator For Battery Status. Adjustable Collar Strap: Comfortably Fits Most Breed Sizes, Ensuring Your Dog Is Both Safe And Comfortable. Positive Training: Gentle And Effective, This Collar Helps Correct Unwanted Barking While Promoting Good Behavior. Fits Most Breeds: Suitable For Dogs Ranging From Small To Large, Making It Versatile For All Kinds Of Pets. Sensitivity Levels: Offers Customizable Settings To Adapt To Different Environments And Dog Sizes. Experience peace of mind with our innovative Dog No Bark Collar, designed to blend seamlessly into your pet's lifestyle, ensuring a quiet and obedient companion without compromising their well-being.