[Angle] Real Time Measurement Of The Vehicle Roll And Pitch Angle During Driving, The Range Is -40°~ +40°. The Current Altitude Of Your Car Can Be Measured. [Gps] Gps Satellite Positioning, Make Sure You Will Not Go In The Wrong Direction. Perfect For Traveling And Driving Adcentures. [Speed] Obtain The Current Driving Speed, With Over Speed Alarm Function, As Well As Display The Local Time. [Real Time] Voltage Monitoring, Can Avoid Safety Hazards Caused By Too High Or Too Low Voltage, Prolonging The Lifespan Of The Battery. Package Includes: 1 X Car Hud 1 X Cigarette Lighter Power Cable 1 X Refitted Power Cable 1 X Holder