Features: Portable handheld generator, can be used as backup power. High power USB charging generator, powerful generation power. Robust structure, low noise, stable working performance. The faster the speed of the hand crank, the more power. The maximum power is about 20W. Compact size, light weight, easy to use. It can be used in field operations, field trips, rescue operations, natural disasters, survival training, emergency communication, long-term power shortage, tourism, emergency electricity, etc. Specification:Condition: Material: Metal Weight: 758g/26.7oz Power Generating Speed: 2000rpm Power Generation: About 20W Applicable Voltage & Current: 3V/ 6.6A, 5V/4A, 6V/ 3.3A, 9V/ 2.2A, 12V/ 1.6A, 15V/ 1.3A Package List: 1 x Handheld GeneratorNote:1. The output voltage of the handheld generator must be greater than the set voltage to stabilize the output voltage.2. Before using external USB port devices, please set the voltage to 5V.3. Please turn the generator clockwise and do not shake the handle at high speed when connecting electrical appliances with less than 3W.