Features: 1. Plug & Play: After connecting to the power supply, the car HUD head-up display works directly without additional operations. Provides smooth and continuous display with no skipped speed readings. 2. Innovative Design: Built-in sunshade prevents glare, ensuring clear visibility of the digital speed display even in direct sunlight. Large font is clearly visible during both day and night. 3. Note: This device is a GPS digital speedometer that receives speed data from satellites. It may not display accurate speed when used indoors or in areas with poor GPS signal, such as parking lots. For best results, use outdoors while the vehicle is in motion. 4. Widely Compatible: Built-in GPS chip makes this car HUD head-up display suitable for use in cars, buses, trucks, bicycles, and scooters. Material: ABS+PC Color: Black Package Contents: 1 x GPS Speedometer 1 x USB Cable 1 x English Manual Note: Light reflection and differences in screen displays may cause slight variations between the color shown in the image and the actual product. Measurement error allowance is +/- 1-3 cm.