12V-60V 600W permanent magnet DC motor, generator
Can be used as a generator, add a hand crank on the output shaft, it can be turned into a hand crank generator, add the blades of the wind, it can be used as a wind generator, you can also use the water turbine to drive the

With sprocket weighs 2.5 kG, with 410 specification bicycle chain gear. Generate power as low as 45 rpm
Low voltage and high torque, with sprocket, output shaft diameter 10 mm, sprocket 410 specification 9 teeth. All of them have a body diameter of about 10 centimeters and a total length of about 12 centimeters.