OBD2 HUD A900 3.5 Inch Speedometer Projector Car Head Up Display

OBD2 HUD A900 3.5 Inch Speedometer Projector Car Head Up Display Product Description HUD short for Head Up Display, it is a driving aid now widely used in private cars.   It firstly used on French Phantom 50 fighters,as many new techs developed by wars.Later used for individual combat system by the United States.This integrated electronic display device made by electronic components, display components, controllers and high voltage power which projects the flight parameters, targeting attacks, self-test and other information by Optics onto the front cockpit in image and character.   When drivers at high speed, especially at night, they may bow to watch the dashboard or the central console. Supposed there an emergency happens leads to accident, we got a idea for car HUD head up display.   Nowdays,many high-end vehicles original with HUD such as the BMW 7s, Audi etc.HUD can display important dash data(speed,RPMs,fuel..) on the front windshield which can help drive