Nite Dawg:~ Made of high quality nylon, this lightweight, durable collar houses a flexible, light-transmitting polymer core that illuminates when the collar is turned on. A reflective stripe adds additional safety by providing passive reflectivity. Powered by a super-efficient (100,000 hour) LED bulb, it's literally a brilliant way to keep your dog safely visible up to 1000 feet - to you, to other people, to cars - during any late-day or early morning outing. Fully weather resistant, powered by a replaceable battery (included).
• Glow and flash mode
• 100 hour battery life
• Replaceable Battery Included _ 1 x 2032 3v Lithium Coin Cell
• Features a strong metal D-ring, quick release buckle and weather resistant push-button switch