Lightest, Brightest, Toughest light in it"s class. * Be Seen! Omni directional light is visible to over 1 mile * Waterproof up to 300 feet * Uses 2 CR-2032 Batteries. Dual Function Circuitry offers Steady On Mode of over 100 hours or Flashing mode over 250 Hours. * Removable clip allows light to be clipped or laced on to almost anything