Trouble & Trix cat collars are contained within three unique brands. Choose which brand reflects your cat's personality and style. Each collar has a round bell with a complementary mega bell included. The Park Ave collars are reflective for night time safety keeping your feline friend safe while prowling in the night. Each collar has two bells to warn other wildlife your hunter is coming. Detachable clip allows you to easily remove or add the bell to the collar. All collars either have an elastic stretch segment or a safety clip that allows for a quick release if your cat is caught in a tree. Great designs to match any cats personality.