Car Compass & Speedometer

Head Up Display Digital Speed Slope Meter Compass Inclinometer GPS Speedometer Overspeed Alarm Off Road On Board Computer HUD Features: 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 satellite positioning, make sure you don't go in the wrong direction. Perfect for traveling and driving adcentures. 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. Suitable for all vehicles, such as vans, trucks, buses, cars, off-road cars, SUVs, and other Vehicles.   Specification: Power supply: DC10V~30V; Operating temperature: -40°C~+80°C; Pitch angle: -40°~+40°; Roll angle: -40°~+40°; Voltage measurement range: DC10V~30V; Voltage measurement accuracy: 0.5V;  Speed accurac