LED glowstick for visibility & safety Twist to turn on and off Waterproof and will actually float in water 60 hour battery life 4x replaceable AG-3 batteries included The Nite-Ize LED Mini Glowstick is a compact and lightweight source of powerful illumination, available in four different colors. Its LEDs make it a safe and reusable alternative to regular chemical glowsticks. Simply twist to turn it on and off. Its replaceable batteries provide 60 hours of runtime, ensuring long-lasting visibility. Its durable design isn't only waterproof, it will actually float in water, making it perfect for all-weather use even in aquatic environments. It comes with a compact size #0 S-Biner, making it easy to clip to clothing or equipment for hands-free carrying. Includes 4x replaceable AG-3 batteries.