It doesn’t hurt and it works.
This collar is great. I had tried a citronella collar but my dog didn’t mind the spray. I was reluctant to try a “shock” collar but found this collar doesn’t hurt. He gets a little buzz that irritates him and within days I could see the number of activations had dropped. Love the fact that I can see the activations, as he barks when I am at work and I am concerned about his barking annoying the neighbours. The review light gives me peace of mind.