Versatile Navigation: This dashboard compass ball features two dials for precise directional guidance in cars, boats, or any adventure.Compact Size: Measuring approximately. Features: shockproof, waterproof, accurate pointing.Not all positions in the car are suitable for placing a compass, because all compasses cannot resist the interference of magnetic objects. Please find a suitable place in the car to place the compass. Finally, tear off the double-sided tape to fix the ball compass.Note: If there is a small bubble in the compass ball, it will disappear as the temperature rises. The design is to prevent leakage due to thermal expansion.Luminous Design: The compass features a glow-in-the-dark dial for easy visibility in low-light conditions. The luminous power depending on the light and time absorbed. Please put it under strong light before using it in the dark.Double dialsInner dial is a normal compass dial. Outer dial is opposite to the normal dial, its reading method is for vehicle.V-32-L A+5Precautions for in-vehicle installationNot all positions in the car are suitable for placing a compass, because all compasses cannot resist the interference of magnetic objects.Usually, the blue area in the picture will interfere with the compass, and the situation may be different for different model cars. Please find a suitable place in the car to place the compass. Finally, tear off the double-sided tape to fix the ball compass.V32LDashboard Compass Ball with Double Dials for Cars Boats