1. [windscreen heading screen]: Normal heads for cars use the screens for cars directly on the car, the car's windscreen directly on top of a projection screen, the large font real -time, simple and clear, the title screen for cars does not prevent the vision line of the driver, the driver does not prevent the vision line for cars 2.] UP does not block the driver's vision line and the driver is clearly displayed, . In addition to the existing speed, RPM, mileage, water temperature, time, driving time, voltage, L/H and L/100km can also change a multifunctional HUD speed indicator show. You can switch according to your needs. Equipped with the OBD interface, the digital accelerator can give you more real -time and accurate data feedback. Please see the instructions for using digital speedller for the first assumed values ​​of the five alarm function of the HEADS Up screen and you can set them to your needs. The GPS speed indicator gives you a r driving experience. You can also manually set the screen brightness of the car by referring to the guide. (Please note: This HUD automobile speed indicator is only valid for OBDII and EOBD and is not suitable for cars before 2008) Note: If you find a certain difference on the speed screen after starting the HUD speed indicator, you can monitor the instructions to manual adjust the setting mode.