Our flashlight uses innovative technology for producing electricity in the palm of your hand . Shaking the flashlight cause a magnet to pass thought a copper coil generating electricity. A few seconds of shaking can generate several minutes of power. And best of all our flashlight is always ready for use no matter how long it has been stored. Ideal for home , auto ,boat ,out door & emergency use. Supper bright LED light. Waterproof It floats, Shock resistant