3" Car Digital GPS Speedometer Head Up Display with Overspeed MPH/KM/H Warning Alarm Safer and Easier Driving: Reduces visual distraction by up to 99%, allowing drivers to view speed information with minimal eye movement. Helps reduce line-of-sight adjustments and eye fatigue during driving. Clearer Display: Offers clear visibility in both bright sunlight and nighttime conditions. Adjustable installation positions ensure optimal readability. Display brightness automatically adjusts based on ambient light—increasing in bright conditions and decreasing in low light for improved comfort and safety. Suitable for use in taxis and commercial vehicles. Overspeed Alarm and Driving Time Reminder: Customizable overspeed warning alerts when preset speed limits are exceeded. Provides a reminder after each hour of continuous driving to promote safe driving habits. Mileage and Driving Time Tracking: Automatically displays current trip mileage, driving duration, and total mileage. Also shows altitude and local time. Other Features: Receives accurate, real-time speed data via satellite positioning. Supports quick switching between speed units (KM/H and MPH) to accommodate regional preferences. Specifications: Type: GPS Speedometer Material: ABS+PC Screen Size: 3.0 inch Satellite Positioning Time: 1 to 3 minutes in open sky conditions; no indoor signal. Note that satellite acquisition may be affected during rainy weather. Package Includes: 1 x Car GPS HUD Speedometer 1 x USB Cable 1 x Installation Accessories Set 1 x User Manual