ipinkoo No Bark Collar Training Device,Electric Shock Anti Dog Bark Contorl with 7 Levels Manual Adjustable Sensitivity &#8730 SAFTY STOP BARKING - Our anti bark training collar is a Humane collar harmless for your dog when barking,warning sounds and harmless static stimulus,effective and easy to use,it will stop working for 1 minute should your dog continue to bark. &#8730 STOP BARKING FAST - Replaceable 6-volt Battery, Adjustable sensitivity button from low to high to manual contorl your dog's barking under different condition.If the dog is too small or old, and The Dogs have mental and psychological disease, Please don't use it, because it's too strong for the stimulation. Generally recommend for 15-120lbs dogs &#8730 EASY TRAINING DOG - The No Bark Collar with optimized program by our engineer, it will training your dog stop to bark within shortest "Beep" sound and shock. The stimulations cycle with 7 sensitivity shift, the sound and shock gradually increase until the dog stop barking for 30 seconds. &#8730 EASY TO USE - Adjustable nylon tape from 6"-30" in dog's throat, Easy air blowing method to test the anti bark collar. &#8730 UNCONDITIONAL MONEY-BACK-GUARANTEE - We can SEND YOU A NEW ONE! if there is an issue with your product. Or you are unhappy with your purchase! We will FULL REFUND you.