[. . . ] ¡Fasten the headrest area of the front seat tightly with the upper mounting straps. [. . . ] ¡In the interests of traffic safety, do not perform operations on the unit or view DVD software while driving vehicle. ¡Make sure the unit is fastened correctly to prevent from falling in the vehicle in the event of an accident. ¡Do not operate the unit in extremely hot, cold, dusty or humid conditions. ¡Do not place the unit in an area exposed to direct sunlight (e. [. . . ] , inside a parked vehicle, where there might be considerable rise in temperature. [. . . ]