Large display: The GPS speedometer features a 5inch LCD screen, providing clear visibility of essential data such as speed in MPH, driving data, and mileage at a glance, enhancing your driving convenience and awareness. Safety first: Equipped with overspeeding alerts and fatigue reminders, this device emits sound warnings when speed limits are exceeded and encourages breaks after four hours of continuous driving for a safer journey. Automatic brightness adjustment: With its lightsensitive screen, the speedometer automatically adjusts brightness for visibility in all lighting conditions, making it easy to read during bright daylight or night driving. Advanced processing chip: Featuring a dualcore processor and dual running memory, this speedometer ensures smooth operations with minimal data delays, providing realtime updates on your driving speed and vital information. Use scenarios Daily commuting: Monitor speed, track mileage, and stay aware of driving data to improve safety and planning for maintenance. Long highway trips: Fatigue reminders help you schedule breaks, supporting safer, more comfortable longdistance driving. Variable lighting conditions: Automatic brightness adjustment ensures the display remains readable during bright daylight or nighttime driving.