Detailed Selling Lead Description Product function: 1. Cranking to generate the power to charge its built-in 120mAh/3.6V Ni-MH storage battery 2. 1 LED lighting / 3 LEDs lighting / 3 LEDs flashing for a circle 3. Waterproof under 10m Product features: 1. Adopts 3-phase brushless generator to generate the power, low noise, high efficiency 2. Convenient usage, never needs battery, just need cranking for power 3. Control by electronic switch, long life-span 4. Unique design, novelty, vogue and delicacy 5. Can be used under 10 meters water Use method: 1. Hold the unit, crank the handle with another hand at the speed of 3 circles per second for 1 minute, and then press down button the LED will light 2. Switch model: switch on once, one LED in middle lights up; re-switch on, three LEDs on, switch on again, 3 LED flashing, re-switch the button again, the flashlight off Notice: 1. Do not aim at anyone's eyes 2. Crank it as even as possible (keep rotating steady). Too slowly cranking would make current weak and prolong charging time, and too violate cranking possibly damages the power transferring system 3. Pay attention to the holding gesture when cranking, so as not to hurt your fingers 4. To prolong the inside battery's life, cranking no more than 20 minutes every time 5. Cranking the handle (no less than 1 min) at least once per month to extend the life of product Size: 147.5 x 61.5 x 45mm Weight: 176g