The UR-202's twin turbines are coupled with the winding rotor. According to the position of the selector lever, the turbines act as shock absorbers. In normal activity they cushion sharp movements of the rotor. This reduces wear and increases the lifespan of the movement.
The turbines are controlled by a 3-position selector switch. This functions by adjusting the level of air compression the turbines generate by selectively regulating the amount of air flowing from inside the case.
The spinning turbines force air through holes into a tiny air chamber. The selector switch controls the amount of air escaping from the turbines. By restricting the airflow, it increases the air pressure and slows down the turbines and the winding rotor.
The turbine system is totally self-contained within the waterproof case. The air flows from under the turbines and is channeled up past them under a sapphire plate and down through holes leading to a tiny air chamber.