Description: Real Time Display: The V11 Colorful Car HUD Speed Display provides real time display (switchable between KMH and MPH), driving direction, time, and compass during your travel. It ensures you never lose your way and enhances your travel experience.Double Mode Chip: Equipped with a + double-mode chip, it guarantees real time data synchronization with a fast refresh rate and no delay. Its high-performance processing chip ensures powerful performance and compatibility, while the double running memory and double core processors ensure smooth operation.Reliable Quality: Made of ABS plastic material, this Digital Speedometers is sturdy, heat resistant, and has a long lifespan. Size: The Heads Up Display measures 4.64inchx0.71inch, Its compact size does not obstruct the view and can be easily connected via USB. It starts and stop with the vehicle without worrying about power consumption.Additional Features: The V11 HUD comes with color changing lights. Specification: 11.78cmx1.8cm/4.64inchx0.71inch Package Includes: 1 SetDigital Speedometers Note: Please allow slightly errors 1-2cm differences due to manual measurement.