MITSUMI DC 6V-38V Generator Motor Wind Turbines 2400 9000Rpm For DIY & Other Input speed: 2400-9000RPM... Output voltage: DC6V-38V... Max load current: 880MA... Output diameter of axle: 3.17MM... Weight: 220g... Motor output voltage is related with speed , the higher the speed, the higher the output voltage... Can be used below 12V LED lamp lighting, mobile phone charge, bicycle power supply, scientific experiments and inventions, outdoor power supply, and other purposes.