H4's latest Auto Head-Up Display with a color windshield projection delivers a large, crisp font and a cool looking display. It provides a real-time speed readout, a main HUD display, and a compass. The unit supports switching between mph and km/h to match different country requirements. Key benefits - Keep eyes on the road: know your actual speed without looking down, helping to improve driving safety. - Clear daytime visibility: designed for bright daylight and not dazzling at night thanks to ambient light sensing. - Simple power, no hassle: USB powered and plug-and-play, no battery drain, no wires to cut or drilling required. What it shows - Real-time vehicle speed (main display) and a compass readout. - Color display on a windshield projection for easy reading. Why this design stands out - Large, clear font for quick recognition. - Auto adjust brightness based on ambient light to stay readable in day and night. Compatibility and setup - Power via USB; requires a vehicle USB power source. No battery, no complex wiring. - Quick install in about 5 seconds by plugging into the USB port. Use scenarios - Daily city driving: monitor speed without diverting attention from the road. - Highway cruising: keep track of speed with a stable, readable HUD. - International travel or rental cars: easily switch between mph and km/h to match local regulations. Notes - Maintains the original product’s function: speed display, compass, color windshield projection, easy USB power, no drilling.