Perfect for work or play, the LED Mini Glowsticks are bright, functional and battery powered, providing you with up to 60 hours of illumination per four AG-3 batteries. They are also water resistant, floating when dropped in any puddle or pond. __ Great to keep in your car or emergency kit, or take camping. _LED Glowstick for visibility & safetyTwist on/offWaterproof - it floats!Included #0 plastic S-Biner for clippabilityRun time: 60 hours4x replaceable AG-3 batteries includedDiameter: .8" | 19.1mmLength: 6.2" | 157mmWeight: .6 oz | 18g