Light weight and comfortable shape make Princeton Tec's brand new handheld waterproof dive light, the League 100, the ideal backup light in the water. This light even feels good enough to become your favorite on dry land. This unobtrusive light hides out of the way until it is turned on. The sculpted shape makes it feel like an extension of your hand and it provides impressive output for its size. Uses 4 - AA Alkaline (not included) batteries that can last up to 10 hours.