W Mall NEW Multi Car HUD ASH-4 Fuel Consumption Water Temperature Speed Head Up Display Car-adapted automatically, can use this product to all cars with interface of OBDII or EUOBD (car automatic diagnosis system), directly plug this product the interface Display car speed, engine speed, water temperature (voltage / throttle position), fuel consumption, GPS navigation (optional) at the same time Can choose the normal display mode, the high-speed display mode, the automatic display mode GPS graphics + voice navigation function, Built-in loud speaker, never miss road information(GPS optional) display area;107 mm x 62 mm,Facilitating data reading; (ASH-3: 90*55mm)