The rubberized ball can absorb some of the low frequency vibrations that come from the engine or road (bumps, holes, porphyry) and are transmitted to the handlebars. With less vibrations that propagate to the cell phone port, there is less risk of damaging the components present in the latest generation of mobile phones.
The sphere allows the phone holder to be fully adjustable, allowing its use and display both in vertical and horizontal. The ring allows to lock the head once the optimal angle has been found.