Nite Ize NiteHowl LED Safety Dog Collar Necklace, adjustable for dogs of all sizes, ensures safety and visibility in the dark. Crafted from durable, weather-resistant polymer tube, this necklace illuminates 360 degrees with two bright red LEDs. Featuring glow and flash modes, it easily slides over your dog's neck for hours of nighttime safety. Backed by Nite Ize's satisfaction guarantee.