This gearbox offers 6 ratios and 12 different speeds.
The unit operates on 1.5 or 3.0 Volts D.C. power sources,either battery or suitable transformer.
It's simple versatile design and sturdy construction make it suitable for a host of uses from powering models and robots to teaching the principles of mechanics.
Current consumption depends on eventual load but is in the range 0.2 to 0.8m Amps.
The output shaft is 3mms diameter.

Other Electric motors with reduction gears are available.