1. Comprehensive Car Digital Speedometer: Beyond speed measurement, this GPSenabled HUD offers travel direction indicators and dual alert systems for overspeed and driver fatigue. It prompts you with audible alerts after 8 hours of continuous driving or when exceeding speed limits, ensuring your journey remains safe. 2. Intelligent Automatic Brightness: Equipped with a builtin light sensor, the HUD intuitively adjusts its brightness to provide visibility in varying lighting conditions, day or night. Manual adjustments can also be made easily. 3. Advanced Windshield HUD: This innovative headsup display transforms your vehicle's windshield into a realtime data projection screen. Clearly displaying speed and other critical data without cluttering your sightline, this digital companion enhances both your driving convenience and safety. 4. Universal Compatibility Easy Setup: Designed for universal 5V vehicle compatibility, this speedometer connects effortlessly via USB. Initial setup includes allowing the device to locate satellite signals, indicated by a flashing satellite, ensuring accurate performance.