ITEM NAME:Adjustable Car Dashboard Navigation Compass Ball for Boat Marine Truck A#S Product Description Description: Adjustable Suction Cup Car Dashboard Navigation Compass Ball for Outdoor Boat Marine Truck Features: 1. This product is a professional multi-function car marine navigation compass. 2. The user can use the correction tool attached to correct the deviation of the compass. 3. Due to the convenience of the driver's observation and habits, this product has specifically reversed the magnetic steel. So the compass of this product is pointing in the direction in which the car is heading. (Inverse to the direction of conventional compass products). Specifications: Material: plastic Colour: Black Product size: 70 x 50 x 50mm/2.76 x 1.97 x 1.97" Net weight: 49g Gross weight: 60g Note: If the pointing is not accurate in car, generally it is because of the magnetic field interference in car. Change another location. It is recommended not to have more than two navigation compass balls together, because they will interfere with each other, affecting the direction. Included: 1 x Dashboard Navigation Compass Ball.So the compass of this product is pointing in the direction in which the car is heading. (Inverse to the direction of conventional compass products). The user can use the correction tool attached to correct the deviation of the compass.