Dog-E-Glow's lighted LED dog collars are fashionable, high quality, and weather resistant. They combine the functionality of illuminated LED lighting with awesome looking patterns. Our lighted dog collars allow you and others to easily spot your dog from a distance when it is dark outside, and look great during the day! With our LED dog collars, you can easily see where your dog is at all times. Combining a lighted collar and lighted LED leash is the perfect way to keep your dog visible to you, other people, and cars at night or times of low visibility. Features: Steady Glow and Flash Mode 150 hour replaceable battery life 100,000 hour L.E.D. Life Fully weather-resistant, visible up to 1000 feet in the dark Batteries and one set of replacement batteries are included (Four 2032 3V Lithium Coin Cell batteries) Don't forget a matching LED leash to complete your set!