The presence of a car navigation system in a vehicle's interior space greatly impacts the interior design. It can be said that the system's beauty when not in use, instead of just superior functionality alone, can foster comfort inside the vehicle. This product has a simplicity that stands apart from other navigation systems. This covers not just operation but even the curves of the case when viewed from behind. Its interface not only uses button design but also employs colored surfaces as buttons, achieving a design that realizes both beauty and functionality by enlarging the detailed text displayed there.