What is the function of the shark fin on the back of a car?

[MarianaRose]

Here is an introduction to the functions of the shark fin on a car: 1. The shark fin has a radio reception function, ensuring normal sound signal reception even at high speeds, allowing the driver to listen to the radio normally. 2. The shark fin is used to receive GPS signals. Many cars come with built-in navigation, and the shark fin's role is to receive GPS signals for the proper use of the navigation system. 3. The shark fin is used to receive GSM signals. The quality of phone calls in high-speed cars is closely related to the function of this shark fin. Including system upgrades and network services, all rely on this shark fin to enhance signal reception and transmission. 4. The shark fin has the function of discharging static electricity. In dry winters, the car's precision instruments need to release static electricity, and the shark fin helps discharge it, providing a protective effect. 5. Another function of the shark fin is to reduce drag and wind noise. The previous long antennas had significant wind resistance, but after replacing them with shark fins, both drag and wind noise are greatly reduced.