Gulflink Head Up Display Vehicle Speed Meter M3

Over-speed Alarm and fatigue driving alarm to ensure your safe trip. Default setting is 120KM/H or 120MPH. When over-speed alarm is active, it will beep in 3 times to alert the car driver, you can adjust according to whether you need overspeed alarm. Accurate positioning and real-time synchronous display of data. Display Driving speed, time, voltage, driving icon, Driving mileage, automatic light adjustment, alarm sound switch, satellite number, Altitude, compass , automatic switch. Easy to Set up, no complicated operation required. Only connect with USB cable, no professional installation is required. Compatible with all kind of cars & trucks, etc..