Precautions: Regarding the direction accuracy: it is an accessory product and cannot be compared with a precise instrument, it can only be roughly pointed (there is a difference, it is normal) How to use the south (north) needle : 1. Lay the compass needle (north) flat, turntable type compass needle (north), as long as the turntable stops rotating, just read the words on the dial. The direction indicated by the Chinese version of East, West, North and South is East, West, North and South. In the English version, N is north, S is south, and E is east. W is west. 2. The red needle of the compass needle (north) is north (N). When the compass needle (north) is flat and the needle stops rotating, slowly turn the compass and the N (i.e. 0 degrees) on the inner dial is aligned. The direction in which the red needle points. Then read the East (E) direction; West (W); South (S); North (N) on the dial is the correct direction. Noticed : 1. The red needle of some pointer compasses in the Chinese version points to the south. When aligning the needle, the red needle must be aligned with South S (i.e. 180 degrees), so that the direction on the dial is correct. This is not because the compass needle (north) is wrong, but according to our traditional Chinese standards. For the compass needle (north) you are using, you need to clearly remember whether the red needle is a guide or north, to save time when using it in the opposite direction. 2. When using the compass needle (north), there should be no irons, magnets, etc. or the dial inside should be placed flat) 3. Some vehicle-mounted (north) guide balls are made in the opposite direction to save driver effort and time. When the driver sits in the cabin and sees the words on the front (north) guide ball: east, that is, the direction of the car is east, and the guide ball (north) used by itself must be confirmed if reversed -made. 4. When the compass needle (north) is not in use, it should be kept away from magnets, iron and other magnetic objects and kept at a constant temperature.