Fangrui Product Details Fangrui Product Details [what Is H4 Hud] H4 Is A New Upgraded Version Of The Head Up Display, The First Color Version, With Bright And Eye-catching Colors, A New Interface Design, Larger Fonts, Clearer And Smoother Graphics, Very Beautiful, Giving People A Visual Experience. [h4 Function Display] The Head Up Display Has Multiple Functions That Can Be Switched Freely. For Example: Vehicle Speed, Compass, Ambient Lighting, Number Of Satellites, Automatic Photosensitivity, Overspeed Alarm, Mileage Switching, Etc. You Can Clearly Know Your Driving Speed, Time, And Direction While Driving, And Many Features Of This Head Up Display Can Your Driving Safety. [automatic Light Sensitivity] The Head Up Display Can Automatically Adjust The Brightness Of The Light Sensitivity, Making The Scorching Sun Clear And The Night Soft. This Is A Carefully Designed Automatic Sensing Of Ambient Light Based On The Principle Of Photoelectric Effect From A Professional Hud Manufacturer. It Is Clearly Visible During The Day And Not Afraid Of Being Dazzlin