Auto Adjustment: This digital speedometer has an automatic adjustment mode, which is very convenient and can also be adjusted 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. Checking your driving directions is very convenient. High-definition display: The digital speed measuring screen is a 2.2-inch high-definition screen, small and exquisite. The high-definition LCD screen is clearer and more intuitive. EASY TO USE: The Speed HUD is plug and play, no professional installation required, and the included USB cable in the package can meet your needs. Automatic start and stop: The digital speedometer starts and stops with the car, effectively protecting the car battery; it is easier to control the head-up display if the manual switching mode is maintained.