Read in the dark without distrubing anyone - in bed, in a tent, in a dorm, on a train, plane, car or boat - with the compact book light that's small enough to take anywhere. Folds flat for storage and runs on 3 AAA batteries. ( Batteries not included.) LED light casts a white shadowless beam of light that's easy on th eyes, with a bulb that lasts over 100,000 hours. The LED lasts a lifetime and never needs to be replaced. LEDs are energy efficient, lasting over 20 hours on a single set of batteries.