Head-up Display Real Speed GPS Vehicle Altitude Meter 1. High-end composite material, PC+ABS, high temperature resistance and no deformation 2. Multiple installation methods, free placement 3. Not limited to car models, all cars can be used 4. Multiple alarm prompts, safer and more considerate 5. USB connection, no OBD power supply required, no standby current 6. Dual-mode chip is more secure, high precision, high refresh rate, built-in GPS and Beidou chip modules, up to 32 satellites can be received 7. Ignition turns on, automatically shuts down when the engine is turned off, built-in photosensitive element, brightness automatically adjusts with the external environment 8. Automatic atmosphere light, alarm light, automatic brightness adjustment, can also be turned off manually 9. Graphic speed: changes with speed 10. Rest reminder: you can set the rest reminder time to remind the length of the rest time 11. Speed ??alarm: set the speed alarm value, and sound and graphic alarm can be used when reached 12. Weak GPS signal: when the GPS signal is less than 6, flashing alarm 13. Speed ??value: display the current speed 14. Units of mileskilometers: MPH for miles, KMH for kilometers 15. Time: Get the current time through GPS 16. Driving direction angle: the angle value displayed for the current driving direction 17. Driving distance: the cumulative driving distance since this startup 18. Driving time: the cumulative driving time since this startup 19. Date: get the current date through GPS 20. Altitude: the altitude of the current location 21. Size: length 95mm, width 56mm, height 86mm