Car, Navigation Wide Application for Auto Boat RV Specification: Item Type: Car Material: ABS + Acrylic Application: Widely in outdoor activities, RV, yacht, camping, etc. Function: Due to the convenience of the drivers observation and, this product has specifically reversed the magnetic steel.So the of this product is pointing in the direction in which the car is heading. Inverse to the direction of conventional products. Package List: 1 x 2 x Screw 1 x Metal Pick 1 x Tape Note: 1. If it is not accurate in the car, it is usually due to the magnetic field interference in the car. Switch to another place. 2. It is recommended not to put more than two navigation balls together, because they will interfere with each other and affect the direction. The reverse magnetic steel, pointing in the direction in which the car is heading, convenient for driver's observation and habits. Users can correct the deviation of the with the included calibration tools, ensures high accuracy. Wide range of applications, it can be for outdoor activities, rides, yachts, camping, etc. It is made of ABS and acrylic material, rugged and corrosion-resistant, which has long durability. The installation is simple and does not require complicated operations, which is convenient for using.