Retractable Dog Leash, Megipet 16ft Pet Retractable Dog leash Bright 9 LED Detachable Flashlight for Small to Medium Dogs Black This retractable dog leash is made of environmental protection material. Comfortable grasping, lock or release the lead just by one touch button. This dog leash gives your dog plenty of space within your control. Durable nylon ribbon leash can carry your dogs up to 70lbs! It is especially designed with a anti-slip handle for secure gripping, 16ft length lead belt with comfortable soft-grip ergonomic handle and brake gives you and your pet enough space and safe roam. We made sure each leash component was designed for durability, safety and convenience in mind. Makes walking your dog a better experience overall. Built-in 9 LED detachable flashlight provides you clear illumination for a better nighttime use. (AAA batteries are not included). If the button can't be pressed down when you want to lock the lead, it's due to the brake bumps the raised node on the inner rotating wheel. It's not product fault, here you just need to pull out a little rope of the casing, then try to press the button again, the lead is locked now.