It is a functional part.
 First, the exterior is equipped with a shell, and the interior is also equipped with anti-theft components, which can effectively prevent the external vehicle antenna from being stolen. In addition, the shell can also play a role of waterproof and dust-proof, and can improve the durability of the antenna. It is not necessary to take down the antenna when washing the car automatically, and it can be washed directly.
 Secondly, because the shape is designed to be the shape of shark fin, which is more aerodynamic than the traditional cylindrical antenna, it can reduce the air resistance when the vehicle is driving, especially the wind noise generated thereby. And the side area of this shark fin antenna has been greatly improved, which can better capture electronic signals.
 Third, the shark fin antenna placed on the roof can concentrate the static electricity on the top of its tail and release it, which can effectively avoid the damage to the on-board electronic equipment caused by the static electricity accumulated in the use of the vehicle.
 Fourth, the signals that need to be received on cars today are not like the previous FM radio waves, as well as a series of electronic signals such as GPS and GSM. Many shark fin antennas integrate functions related to the reception of these signals.