GPS speedometer display: super large 5.5-inch screen, which can display the most important MPH data and driving time/mileage/time/direction at the same time. all data requirements Driving safety warning: As we all know, life safety is the first priority, speeding and fatigue driving are not allowed, our car speeding alarm HUD has two important reminders, speeding reminder and fatigue driving reminder, when the speed exceeds the value you set, it It make a ticking sound to remind you to ; if the driving time exceeds 4 hours, it remind you that you need a short rest, and the considerate safety steward during the journey High-definition data display: Equipped with an automatic photosensitive screen, no manual adjustment is required, the most suitable display brightness be automatically adjusted according to the external light, the clearest data can be obtained no matter day or night, no longer worry about the problem of not being to see the display when the sun is strong Technology processing chip: digital GPS speedometer hud has a built-in chip with super performance and compatibility, dual-running memory and dual-core processor to high-speed smooth operation, provide data for your car travel life, effectively reduce data delay problems, and follow up the car in real time speed Easy to use: One-button operation, long for 2 seconds to enter the setting menu, short to switch display mode, left to switch speed and driving direction angle, right to switch time, number of satellites, driving distance, driving time, etc. Reminder: Since most HUDs on the market have GPS speedometer displays, they can only display the current mileage. Because it works on the power of the car, it cannot save the previous distance data when the car is turned off, nor can it accumulate the total distance traveled when the power is off. Brightness auto-sensing and manual adjustment: The default setting is auto-sensing brightness. How to get