Works like a charm. I really only needed to use it twice. My smart dog will quit barking for no reason. I have it for if/when he forgets!

The only feature I have used is the vibration mode, and it seems to work well. The dog is smart enough to realize she only gets the vibration if the collar is on, but if she barks with it off and I make a buzz noise she immediately stops.

I'm not totally happy with it. I have a small boarding kennel with some persistent barkers, and it's not always working. I recharged it last night and so far the dog hasn't barked through it. My friend ordered two and hers work better. They were the 500s. I'm going to keep working with it and hope it gets better. I maybe didn't have it turned up high enough for some dogs.

Easy transaction. Fast shipping!!!