Packing list: 1 x wind dynamo Features: Made with premium materials, firm structure, wear-resistant and stable performance.Adopts efficient motor and planetary gear transmission, with high working efficiency. Simple construction, easy operation.Easily turns on a bunch of LED lights by crank.It can be used as emergency lighting power supply, charging, experimenting, teaching , hydroelectric generator.Can also be used to do a small experiment, can be used as a charging device for a small capacity battery, etc. Features: Name: Wind Power DynamoMaterial: ABS and metalColor: black and silverOutput voltage: 12V, 24VMax. output current: 1500mAMax. charging power: 20WItem size: 130x35x35mm or 5.12x1.38x1.38inPackage size: 150x50x50mm or 5.91x1.97x1.97inPackage weight: 310g or 10.93 ounces