WYOBD G15 HUD GPS Car Speedometer or Clock Watch Safety Driving Head-Up Display Supports Fuel Vehicles Gasoline Hybrid Vehicles New Energy Vehicles Bus Trucks Display Function 1Speed 2Time 3Driving distance 4Driving time 5Driving direction 6Number of satellites 7Speed/Timeauto switch 8Mile/Kilometer 9Overspeed alarm 10Fatigue driving reminder Products can be placed anywhere Made with heartProduced with ingenuity Every inch of ingenious product is carefully manufacturedUsing seamle fastening technologhy Make G15 more beautiful. Free to choose your favorite color atmosphere lights Switch screens to display different functions What is the use of 1Clock watch2Speedometer3Car atmosphere light gadgets4Record driving mileage, driving timeYou can freely adjust the color atmosphere light you like. Any car can be usedCan be used with USB (5v).One USB cable, plug and play. Perfectly compatible with vans trucks,buses carsoff-road vehicles suvsand other vehicles. GPS Display FAQ 1. There is no display on the screen, no electricityPlease check whether the USB cable is damaged, or replace the USB cable test (note: it is forbidden to use a voltage higher than 5V for power supply)2. No speed displayAfter the power is turned on, the satellite icon flashes to indicate that it is in the satellite search state. Please move the car to an open road to receive the signal. After the satellite icon stops flashing, the machine can be used normally.3. Time Calibration1. The machine defaults to