Smart HUD: Our heads up display defaults to speed in mph,fit on car dashboard very well. Even elderly people with weak sight or drivers with sunglasses, the speed is very clearStrong Signal Reception: Our car hud uses dual-mode chip technologyGPS+BDS signalswith a high refresh rate of 10 Hz for rapid, accurate reception. It can pick up to 32 satellite signals, it maintains a stable connection for precise speed data, whether you're driving in urban or rural areasUSB Cable Plug and Play: Designed with simplicity in mind, our digital speedometer is easy to install and suitable for all types of vehicles, including cars, motorcycles, and trucks. Whether you drive a compact sedan or a large commercial vehicle, installation is effortlessAutomatic Brightness Adjustment: The hud for cars features intelligent light sensors that automatically adjust screen brightness based on external light conditions. This ensures clear visibility in different lighting situations, whether it's bright daylight or dimly lit environments at night, providing a comfortable display for enhanced driving safetyTips: If you find that the product does not respond after plugging in the USB port, please check whether the USB port of your car is normally energized, if there is any problem with the product, please contact us to give you a solution, we will reply you within 24 hours.Clearer display:Our mph speedometer are designed with large fonts, together with the metal blackening technology, which can effectively eliminate excess reflection and ensure a clearer displaySuitable for all Cars with USB Port: Designed with simplicity in mind, our gps heads up display is easy to install and suitable for all cars with USB port, including cars, motorcycles, and trucks. Whether you drive a compact sedan or a large commercial vehicle, installation is effortless, allowing you to enjoy the convenience and safety benefits of our digital speedometerTips: If you find that the product suddenly does not work, it maybe that the product has lost its signal, In the indoor garage or underground garage may appear to search for the signal situation , we recommend that you go to the outdoor operation