Features: 1. Plug & Play: After connecting to the power supply, car head up display can work directly without any other operations. No skip speed, more coherent and smooth display. 2. Note: This device is a GPS digital speedometer, and the speed is collected from satellites. So if you test at home or a parking lot, perhaps the speed cannot be displayed correctly. Please conduct the test outside the vehicle with good signal. 3. Widely Used: Built-in GPS + BEIDOU chip, car head up display is suitable for all cars, buses, trucks, bicycles, scooters. Package Included: 1 x Head Up Display Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.