1Compatibility: Car Hud display is universal for all Gps mode, and available for vehicles manufactured after 2008. Please check vehicle compatibility carefully. 2Functions: Obd mode Hud can display vehicle speed, water temperature, voltage, fuel consumption, rotational speed, clock, single driving time, single driving distance, driving direction, etc. 3Easy Reading: The tachometer and speedometer analog display has a pointer that moves to indicate the value, so you can visually identify the engine Rpm value and speed. 4Alarm Alert: The display has over speed alarm, speed alarm, water temperature alarm, voltage alarm, oil temperature alarm, exhaust temperature alarm, oil pressure alarm, turbo pressure alarm, etc. 5Clear Display: The Hud uses a high definition Tft Lcd display, which shows clear information and vivid colors, also has a multi page switching function, allowing you to monitor the speed of your vehicle more comfortably.