Uses a semi-transparent, semi-reflective lens to display information stereoscopically in the air. Unlike windshield project film, you can always see the clear, crisp image on the display board, never ghosting or double image. GPS Mode Information Display: Speed, travel time, satellite time, altitude, number of satellites, running direction, single mileage, voltage, acceleration test, brake test. Alarm: Overspeed alarm, low voltage alarm, free switching between kilometer and miles. Auto and manual brightness adjustment mode, driving without. With auto on or off function, HUD will start or turn off automatically with vehicle ignition, can effectively protect your battery vehicle. Retain manual switch mode, easier to control HUD. Multi-function display: Speed, Speed and Clock, Speed and Single Driving Distance, Speed and Altitude, Speed and Satellite Number, Speed and Single Driving Time. Can be freely switched.