G15 Car HD GPS Head-Up Display with Color Changing Ambient Light 1. Universal car HUD, non-invasive installation, compatible with most vehicle models 2. Compact design fits in any corner of the windshield without obstructing driver's view 3. Powered via car USB or cigarette lighter port; automatically powers off with ignition to prevent battery drain 4. Features 10 Hz high refresh rate GPS and Beidou dual-mode positioning for fast, smooth speed updates 5. Adjustable ambient lighting with multiple color options: blue, light green, green, cyan, purple 6. Built-in light sensor automatically adjusts screen brightness based on ambient lighting conditions for optimal visibility 7. Displays real-time driving information including vehicle speed, time, number of satellites, trip distance, and travel duration 8. Includes safety alerts: speeding warning and fatigue driving reminder