Note:
1. This compass is specially designed for driving & boating navigation. Thus the reading is totally opposite to normal compass. For example, when you are facing NORTH while the compass is placed in front of you, the reading shows "N" to you and "S" pointing north direction. The reading facing you is the correct direction that you are facing, that is "N".
Reminder:
1. Because there are many places in the cars central control where current passes, magnetic fields will be generated where there is current, which will interfere with the pointing to varying degrees. Different car central controls have different wiring, so there is no way to determine which position. It is recommended that you Try a few more locations and find a location with less interference.
2. Please never let the compass soak in water and keep it away from metal.