The new Flexi Vario LED Light System is one of several accessories that are meant to be used with the Flexi Vario leashes line. The LED Light System easily attaches to small, medium, and large leash handle sizes using the velcro tape system. This system is created to provide extra visibility and safety for you and your dog. It has a front light and a red back light which can be switched on and off separately. Batteries are included.