The invention relates to an air vent, especially for a motor vehicle, comprising an air channel for supplying air, and an air guiding device. After the ring-shaped magnet 34 is attached at inner circumference face 31B of an opening portion 31A of a cap-shaped rotor main body through a yoke 33, a rotor shaft portion 31C formed at outside of the main body of the rotor 31 and an attaching hole 31D of a shaft 32 fixed at the main body of the rotor are worked standardizing inner circumference face of the magnet 34. The system receives a data unit associated with an unprovisioned data flow, determines whether the unprovisioned data flow falls within the flow range, and creates an automatically provisioned data flow based on the unprovisioned data flow when the unprovisioned data flow falls within the flow range.