Dogedu Du153 No Bark Collar Sensitivity Adjustable with Beeper Static Shock LATEST VERSION-No Harm Design - Very humane collar, 100% safe and no pain dog bark collar , Harmless to your dog ADJUSTABLE - Sensitivity is user-adjustable according to your dog's barking and specific environments, If you use this collar for small dog under 10 pounds, please be careful and test from the lowest sensitivity level COST EFFECTIVE - Replaceable 6 volt battery with Low Consumption. It is not a Rechargeable Battery. This no bark Training Collar is best for 10-120lbs Small, Medium and Large Dogs 100% CUSTOMER SATISFACTION - If for some reason your purchase doesn't work, We will provide immediately Support. If you find any issue with the product, please feel free to email us, we will fulfill your request promptly. If for any reason you are not satisfy with the Collar, we will provide a full refund or a new resend SMALL COMFORTABLE LIGHTWEIGHT - Best bark collar for small dogs. Also use as anti barking device for large dogs. Sits comfortably at front of neck. Strong durable woven collar and lightweight controller make the dog training collars comfortable to wear