Specification: Material: Metal Color: Blue Size: approx 125*80*85mm/4.92″ X 3.15″ X 3.34″(L*W*H) Voltage/Current: 3V/6.6A, 5V/4A,6V/3.3A, 9V/2.2A,12V/1.6A, 15V/1.3A Max power: 20W Power generator strong A variety of interfaces, are free to choose High-quality shaft, saving time and effort Small size, easy to carry Package included: 1x USB Generator Warning： Internal does not store power Before using the USB interface, be sure to set the voltage to 5V 20W Pull Cord Start Power Generator, USB Port Portable USB hand crank charger generator for outdoor travel and emergency use High-power USB charging capability with a maximum output of 20W Manual dynamo design allows for energy supply without the need for batteries Compact size (approx. 125*80*85mm) makes it easy to carry and store Features a variety of interfaces for versatile charging options