It is very inconvenient to hold your cell phone in your hand to look at the route on the map or switch music. To make driving safe and comfortable - use a magnetic phone holder. The holder is inserted into the air duct grille, and the mating part is glued to the back of the phone. There are also options that are glued to the torpedo. The magnet does not in any way affect the phone's performance or signal strength. The kit comes with a square and a round mating part.