Feature:1. Plug & Play: After connecting to the power supply, car HUD head up display can work directly without any other operations. No skip speed, more coherent and smooth display.2. Innovative Design: Self equipped sunshade hat, even in the sun smart digital speed meter can also receive praise. And large font, clearly visible during the day and night.3. 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.4. Widely Used: Built-in GPS chip, car HUD head up display is suitable for all cars, buses, trucks, bicycles, scooters.SpecificationsOutput Frequency:GPS Digital SpeedometerRated Power:HUD Head Up DisplaySize Name:92x52x20mmElectronics:Car accessoriesHUD:Windshield Speed ProjectorPackage Included:1 x Head Up Display