What is HUD?Short for Head Up Display. It displays driving data on its 4.3 inch TFT LCD screen such as speed,driving direction,voltage single mileage etc. HUD avoids the danger of drivers looking down at the dashboard. It ensures the safety of drivers. RICH CONTENTS Compass,Driving latitude and longitude, Vehicle speed, driving direction, voltage, driving distance measurement, driving time, low voltage alarm, over speed alarm, satellite time and number, altitude, freely switch between kilometers and miles,speed up test, brake performance test. Multi function display or simple function display can be switched freely. HD Display HUD has a 4.3-inch full screen and is equipped with a high-definition 2.75-inch TFT LCD screen, which displays the information more colorful, clearly and Super Slim design, full of technology.A variety of operating interface modes and colors can be switched freely, It will bring more fun and Technological sense to your driving experience. WORKS FOR ALL VEHICLESHUD is based on the GPS module inside. WORKS PERFECT FOR ALL VEHICLES. Auto power on/off function, the HUD will start or turn off automatically with vehicle ignition, can effectively protect your vehicle's battery. Automatic and manual brightness adjustment mode, driving without glare.