Specifications: 1. Build-in rechargeable Lithium battery 3.6V 80mA. 2. ABS body, transparent strong PC lampshade and ergonomic TPR grip and button. 3. 1 minute charge (140rpm/Min) provide - 50 minutes for 1 LED light 20 minutes for 3 LEDs light 4. In normal use, Lithium can recharge 500 times. Description: 1. Super bright LED light never need to replacement. 2. Supply power anywhere, anytime by cranking. 3. 2 lighting up to selections: 1 LED and 3 LEDs light. 4. Waterproof and float in water. 5. Submersible 50 feet in water.