Features: 1. Multi Functional: Displays a variety of functions including GPS speed, driving direction, over speed alarm, and more. Automatically switches between km/h and MPH for convenient control. 2. Automatic Light Adjust: Built-in light sensing system that adjusts screen brightness for comfortable viewing experience during the day or night. 3. Driving Safety: Mounted on the dashboard, does not block your view for easy and safe driving. Displays speed and direction without requiring you to look down while driving. 4. High Precision: The HUD speedometer gauge uses GPS and BeiDou dual-mode chips, providing fast refresh rates and no operational delay. 5. Non-Destructive Installation: The package includes double-sided tape to firmly fix the gauge on the dashboard, allowing for easy installation and removal. Specification: Item Type: GPS Speedometer Material: ABS, metal Voltage: DC 5V Functions: Speed Time Driving distance Single travel distance Single travel time Number of satellites 100 km acceleration time Driving direction angle Speed alarm Fatigue driving reminder Mile/Kilometer switching Automatically adjusted brightness