Nitey Leash is a fiber-optic illuminated dog leash that lights up completely from need to end. Nitey Leash helps keep you and your dog safe, visible from more than a quarter mile away in the dark water resistant for rainy night walks. Blue Leash The leash is in try “me mode” so you can see that it does light up. Five Feet Long. Water Resistant. Runs on 3 AAA batteries (included) One size fits most dogs (up to 150 lbs) All items come from a smoke-free environment. Please ask any questions prior to purchasing. Thanks!