If the screen is completely blank then you need a new battery, the watches are always "on". if there are numbers on the screen and you need to know how to get it too start for exercising then just push the red button. In my tips and tricks page is a tip with a link to download the manual for free. For battery replacement go to this link.
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If the screen is completely blank then you need a new battery, the watches are always "on".
if there are numbers on the screen and you need to know how to get it too start for exercising then just push the red button.
In my tips and tricks page is a tip with a link to download the manual for free.
For battery replacement go to this link.