Keep you canine pal's barking under control using this Small Anti-Bark Collar from Ranger, By Zeus. Designed to gently keep your barking under control, this effective, safe and humane collar piece uses sound and vibration to show your pup that his barking is not wanted! Water resistant and lightweight this durable piece is sure to last through all your dog drags it through. Use this Small Anti-Bark Collar from Ranger, By Zeus for dogs 3.6kg???11.3kg, and keep your precious pooch's barking humanely under control.