The GPS speedometer has a large 5.5-inch screen that displays speed, travel time, mileage, direction and more right on the windshield. It provides useful features: speed and driver fatigue alerts to help you drive safely. The display automatically adjusts brightness for day or night driving to see the screen clearly. It utilizes advanced technologies such as dual-core processing for smooth and fast data updates. Operation is simple, with a single button. Just press to switch between different data display modes. You can also access the settings menu, to customize the settings.