Key benefits - Displays essential driving information: vehicle speed, speed alarm, fatigue driving alarm, driving mileage, and the number of satellites. - Decorative atmospheric lights add visual appeal to your car interior. - GPS compass provides clear direction at a glance. - Semi-arc three-dimensional design creates a rounded body that can be placed anywhere. HUD switch and display features - 14 mm field visual effect depth for a clearer and more three-dimensional viewing area while driving. - Automatic brightness adjustment adapts to ambient light for comfortable viewing. - Power supply is 5V; do not use a voltage higher than 5V. - Compatible with most cars and standard USB power setup. Operation and installation - After the HUD is powered on, the satellite icon may flash during satellite search; once satellites are found, the icon stops flashing and the number of satellites is displayed normally. - Connect the USB cable to the HUD and place the unit in a suitable position. - Easy to install and typically ready in a few minutes. Specifications and usage notes - Operating voltage: 5V (do not exceed 5V). - Works in all cars. - 14 mm field visual depth for enhanced 3D perception. - Satellite information is displayed after connection and startup. Use scenarios - Daily city driving: monitor speed and fatigue alerts while keeping an eye on satellite status and mileage. - Long highway trips: track driving mileage, view satellite connectivity, and use the GPS compass for directional cues. - In-car ambiance and customization: use the decorative lights to enhance the vehicle interior atmosphere while on the move.