Great Compatibility: This head up display is GPS + Beido dual-mode chip. It is compatible with all vehicles around world. refresh rate is 10 frames per second, and speed of car changes smoothly and continuously.;Display Function: This head up display can diplay speed, driving mileage, compass angle, satellite icon.;Two Alarm functions: It supports overspeed alarm and fatigue driving alarm. over speed alarm setting is 30-250KM/H. Head up display will alarm when vehicle speed reach to setting value. fatigue driving alarm setting is 1 to 8 hours, head up display will give fatigue driving alarm when your continuous driving time reach to setting value.;GPS Compass: It can dispay all directions, E(East), W(West), S(South), N(North).;Plug and play: Use USB cable to collect lighter.
