Packing list: 1X hand-cranked generator Description: Color: black / green Material: ABS Maximum output voltage: DC 5.5 V Maximum output current: 600mA Use the scene: emergency Product Size: 6 * 5 * 3cm This mini hand-winding electric generator power charger is designed for emergency power supply. USB Charger: It can charge other USB enabled devices to help out of power exhaustion. And it can charge a very wide range of portable devices now and on the future. Generates electricity for mobile phone, MP3, MP4, mobile power, flashlight and so on. Can be repeated use, light weight, small size, protable and convenient travel use. Also a joke gift for your friend. A large crank arm and easy-to-grip knob make generating electricity a breeze. Notes: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight deviation for the measurement data. 3.Thanks for your understanding