Great Compatibility: This head 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 display can diplay speed, clock, driving time, driving distance, number of satellite, driving direction. Compact Design: compact body suitable for placement. No matter where it is placed, it is clear and natural, and dose not block any sight. Two Alarm functions: It supports overspeed alarm and fatigue driving alarm. over speed alarm setting is 0-250KM/H. Head display will alarm when vehicle speed reach to setting value. fatigue driving alarm setting is 1 to 8 hours, head display will give fatigue driving alarm when your continuous driving time reach to setting value. Automatic light adjustment: It can adjust its own brightness according to environment. Clear display, no glare when driving.
