no, when the dog barks if gives off a noise up to 3 times then if the dog is still barking the collar will give a shock according to how you have it set.
It is an adjustable collar for a med-to-large dog. I bought it for my 70lb dog, but did not need to use it because the neighbors got rid of their dog and that dog was why my dog barked at night so the problem solved itself. I tried to measure it and it is somewhere between 16-18 inches stretched out. It was hard to measure because it has the adjustable clip on it.