Nitey Leash is the world's first and only LED dog leash that is illuminated completely from end to end, making both you and your dog visible to traffic after dark. It combines fiber-optic and LED technology to make you and your dog visible from more than a quarter of a mile away. Nitey Leash is also the world's first fiber-optic illuminated dog leash. [Brand New in the Sealed Box] World's first and only dog leash that lights up completely from end to end One size fits most dogs (up to 150 lbs) Five feet long and water resistant Two modes -- steady and blinking Runs on 3 replaceable AAA batteries (included)