Niteize Radiant Rechargeable LED Reusable Glow Stick, Multi

Colour-changing Disc-O Select technology - keep colour alternating  LED Glowstick for visibility & safety Simply push to turn the light on/off - hold for 5 seconds to activate lockout mode which prevents accidental activation and battery drain Waterproof - it floats! - can be submerged in 1m of water for up to 30 minutes Plastic S-Biner for clippability onto a rucksack Run time: 60 hours 4x replaceable AG-3 batteries included Diameter: 19.1mm Length: 157mm Weight: 18g