Energy-saving Lamp It is charged by the dynamo which is driven under cranking. And it can also be charged by USB connecting to the computer. With 6 LEDs, it has great illumination effect. It can be used for reading, traveling, and emergency. The head can be flexed freely. Technical data: Size: 6X7X17CM(Extension length:28CM) Weight: 0.16KGS Materials: The crust is made of ABS resin. LED: 6LEDs, total brightness is 90,000MCD. Storage battery: 1.2V600mA NI-CO battery. Switch: stepless light-adjustable switch Function: Adopting brushless dynamo and NI-B magnetic ring, it can be charged faster. Crank the handle in the bottom to charge the flashlight under emergency. Charged by the USB connecting to the computer for 5 hours, it can work for 7-8 hours. www.flashlight.cc