iMeshbean Dog Training Collars,Electronic Static Shock Upgrade No Bark Collar Adjustable Sensitivity Control Dog Anti-Bark Trainer for Small Medium and Large Dogs EASY TO USE-This dog training collar is easy to use, ergonomic transmitter. Harmless to your dog.Generally recommend for 15-100lbs dogs ADJUSTABLE SENSITIVITY-Delivers increasingly louder warning tones and shock corrections of 7 levels.Sensitivity is user-adjustable according to your dog's barking and specific environments COST EFFECTIVE- Replaceable 6 volt battery with Low Consumption 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 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.