If the module no. of your watch is one of following modules,
please correct the time according to the operation of the Quick Operation Guide.
You can download the Quick Operation Guide directly by clicking the module no. in following.

If the module no. of your watch is not below, please read an operating instruction manual of your watch.
You can download it here.

The Operating Instruction No. is a 4-digit (or 3-digit) number on the back of the watch (back cover). Check the numbers in the center or the square around the perimeter.