Digital GPS Speedometer Universal Heads Up Display for Car 5.5 inch Large LCD Display HUD with MPH Speed Fatigued Driving Alert Overspeed Alarm Trip Meter for All Vehicle

OverviewProduct Description How to set it for getting a more accurate display: Connect the HUD display to your car We can see the satellite is flashing and searching for a star When the satellite stops flashing, press the key button and hold to enter setting item 6 to adjust the calibration local time Check if the speed unit is accurate, you can go to item 5 to set the speed unit to MPH/KMH, i.e. "1"/"0" Fine-tune the speed to be accurate, e.g. if the dashboard shows 100, and the device shows 105, change the default value at 102 Connect Notice: The Mirco USB port on the GPS speedometer is fixed by the card position and solder, please help try not to shake the charging port frequently when the power is on. Any connect or installation doubt of the product will solve by the SinoTrack team, we will provide a solution to your satisfaction. OverSpeed Alarm& Fatigue Alerts Speed alarm after speed reaches the set default value of 150MP/H; Fatigue alert after driving continuously for more than the default value of 4.0 hours; Default values can be changed manually, over-speed setting (0-250), continuous driving (1-8) HD Display Anytime Equipped light-sensitive screens with an automatic dimming function, which auto-adjusts to make the display very clear in daylight/night/bright light/low light conditions. You also can enter the setting “4” to set the specified brightness. Intelligent Technology Chip Professional scheme design makes the performance more powerful: high-performance processing chip, super performance and compatibility, dual-running memory, and dual-core processor to ensure smooth high-speed operation