VIVOBASE Car device creates an natural sferic field to create a shield from harmful EMFs, including 5G. Every electrical device emits EMFs. Every EV and hybrid vehicle emtis more thatn a regular vehicle due to the batteries used. That's just the nature of technology. Those man-made frequencies interfere with the bioelectric signals that our cells use to communicate, thus impeding detoxification, creating oxidative stress, poor sleep, anxiety and stress. VIVOBASE Car has a 4.5 meter range of protection. You plug it into a USB or cigarette lighter adapter which is included in the box. Can also be plugged into a computer for protection in an office environment, classroom, RV, camper, boat, or dormroom. Your car has many electrical features including GPS, all the wiring, electric seats, and battery. Using the cell phone in the car creates even more electromagnetic radiation inside the metal shell. VIVOBASE products do not emit a frequency, block or harmonize EMFs. Effectiveness can not be measured using an EMF reader because it doens't change the EMFs in the environment. It works on the skin to create a natural protective shield so EMFs don't penetrate the body, where they create harm. We use the Espion skin anteanae to test the effectiveness of the shielding. Scientifically proven in double blind, peer reviewed studies by the Bion Institute.