Getting its name from the way the gears rotate like the planets around the sun, the Planetary Gear Box is a precise, highquality gearbox with a RE-260 motor built into the gear box itself to add to its compactness. A wide range of gear ratios can be attained, and two kinds of crank arms are supplied for a wider range of functions. The gearbox has the ability to produce 15kg of torque when the gear ration is at 400:1 and it has a voltage of 3V.