I purchased three of the No Bark Citronella Spray Collars for my three pomeranians. First, the collars don't function properly. They only spray occasionally at random when my dogs bark. When the collar actually works properly and sprays, the dogs are not even phased by it. I'm very disappointed. That's $108 down the drain. I'm having no luck returning or exchanging the collars. Buyers beware. I guess it's not as bad if you only have one dog but with three, I've wasted a lot of money.