Keep an eye on your best friend when the sun goes down. This super-low-profile LED strip fits over almost any dog collar and closes securely with two micro-hook-and-loop tabs. Durable, weather-resistant, and lightweight, it has a light-transmitting polymer core that's illuminated by a super-efficient red LED bulb with two mode settings: flash and steady glow. Light is powered by a long-life, replaceable 2032 lithium battery (included) and visible up to 1,000 feet in the dark. Even when the collar is not illuminated, decorative paw prints provide passive reflectivity for visibility. Fits collars up to 1" wide. Run time on glow setting is 75 hours; run time on flash setting is 100 hours, Gray. Imported.