There is no need to install batteries, just put on the guide ball that can be used, and the installation is simple. We come with a double-sided sticker that you can easily attach to your car or boat.
When installing: the red scale should point to the same direction as the front of the car, and the direction of the red scale line during driving is the direction you are driving.
For example: the driving direction is north, then N will coincide with the red tick line, and the front of the car is aimed at the northeast, then E N will be facing the red line.
Precautions:
1. Place or hold the compass and use it in a horizontal state to ensure accurate readings.
2. In order to avoid the confusion of the pointer, please keep away from objects containing magnetic, electric current, and some metal products (such as high-voltage lines, mobile phones, stereos, speakers, screwdrivers, magnets, etc.) when using.
3. Do not beat or pat the compass with your hands, so as not to affect the measurement accuracy.
4. Do not expose the compass to the sun for a long time. (The temperature is too high or too low will affect the life of the compass)
5. Keep the shell and mirror clean, do not wipe with dirty cloth or alcohol.
6. When not in use, please place the compass in a clean and cool place, away from magnetic substances, to avoid consuming the magnetism of the pointer.
Specification：
Material: ABS Plastic
Size:length 2.56"/65mm; width 2.2"/56mm; height 3.15"/80mm Net weight: 2.82oz/80g Gross weight:3.1oz/88g Noted:Please operate the compass ball as per picture 2 if have problem