GULFLINK Head Up Display(HUD) Vehicle Speed Meter Q7

OverviewCOMPATIBLE WITH ALL CARS: Unviversal,easy to install and use.No OBD Needed. Simply plug into your car's cigarette lighter socket. ACCURATE SPEED, SIMPLE & EASY OPERATION : With GPS technology for calculating the speed, it is accurate; powered by car charger(Provided), Plug & Play, No professional installation required. ABUNDANT CONTENT : Driving speed,driving direction,driving time,driving distance, real time, satellite number, altitude, overspeed alarm, low voltage alarmfree switching between kilometer and mile NANO-TECHNOLOGY: High clearness projector,to eliminate unwanted reflections and can make display information more sharper.Automatic and manual brightness adjustment mode,driving without glare. AUTO POWER ON/OFF: HUD start and off with vehicle started and shutdown, effective protection of the car battery;retaining the manual switch mode,more easy to control HUD.