If you have a quartz model it is powered up by the battery so you do not need wind up your timepiece. 


If you have a mechanical AVI-8 which is equipped with self-winding automatic movement at its core.


If you are not particularly active or do not often wear your watch, the movement of your watch may not be wound up enough for it to work properly. In such a case, your watch may be slightly fast or slow, depending on how you wear it, therefore, you may need to wind it up manually and need to use it up to a week to return to normal accuracy.


If your watch is regularly fast or slow, please contact AVI-8 customer care or after sales service center to get the instructions to restore your timepiece to good working order.


In case , you want more information about your specific AVI-8 model, Please refer to the instruction manual here