P13 HUD Head-Up Display Car-Styling Overspeed Warning Windshield Projector Alarm System Universal Auto OBD mode function: car speed, water temperature, voltage, fuel consumption, speed, single mileage, total mileage, accumulative driving time, number of stars searched, altitude, clock, intake pressure, oil temperature, air-fuel ratio, turbo pressure, throttle, intake temperature, engine load, acceleration test, brake test, fault detection, clear fault code Alarm: overspeed alarm, speed alarm, high water temperature alarm, low voltage alarm, engine failure alarm GPS mode: display information: vehicle speed, driving time, satellite time, altitude, number of satellites, driving direction, single mileage, voltage, acceleration test, brake test Alarm: overspeed alarm, low voltage alarm Features: High-definition display screen, multiple UIs can switch between different screens, and the digital color of the interface can be adjusted freely