Specifications: Head-up display of the driving speed. Calculation of driving time and mileage and display. Easy setup and get power through cigarette lighter. There is no professional installation required. Compatible with all cars, trucks, etc. Use GPS-guided calculation. Automatic brightness adjustment by the sensor for day/night driving. Display of the driving speed of the vehicle. Alarm setting for speeding. Total mileage display after stops. Altitude display. Item Name: GPS HUD Speedometer Material: ABS + PC Features: Easy to Install, Speeding Warning, high clarity Display Length: 10.5cm/4.1" (Approx.) Width: 5.9cm/2.32" (Approx.) Height: 1.6cm/0.63" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x GPS HUD Speedometer 1 x Stand 1 x USB Cable 1 x Rubber Band 1 x User Manual