Auto Tuning: This vehicle speed digital speedometer with auto tuning mode is very convenient, and it can also be tuned manually. There are 2 modes to choose from. Compass Design: There is a compass icon in the upper right corner of the speed digital speedometer. It is very convenient to see your driving direction. High-definition display: The digital speedometer screen is a 2.2 inch high-definition screen, small and exquisite. The HD LCD screen is clearer and more intuitive. Easy to use: The speed head-up display is plug-and-play, no professional installation is required, and the USB cable that comes with the package can meet your needs. Automatic Start/Stop Machine: The digital speedometer starts and stops with the car, effectively protecting the car battery; maintaining manual switch mode makes it easier to control the head-up display. Product list: Digital speedometer*1 USB cable*1 Double-sided tape*1 Suction cup holder*1