This collar uses non-toxic citronella spray to stop nuisance barking. Each time your dog barks, a microphone picks up the sound of it's bark and instantaneously a small spray of citronella is released in front of your pets nose. They hear it, see it and smell it. With a dogs heightened sense of smell, this is quite bothersome. Citronella is totally safe for dogs, humans and the environment. Each anti-barking system comes with a bark unit, a collar that adjusts up to 27" with a a quick snap closure, one can of citronella spray (approx. 300 sprays) and a 6-volt alkaline battery. Use citronella refills only.

One can of citronella spray (approx. 300 sprays.) Citronella is totally safe for dogs, humans and the environment. For use with Citronella Spray Collar and Spray Commander. Non returnable after 30 days.