My M600 won't start, what can I do?

If your M600 won't turn on, it's probably because the battery is empty. 

Plug the M600 into a charger. You'll know the battery is charging if you see an icon of a filling battery appearing on the screen of your M600 for a short while after you plug it into the charger. After you've charged the battery, press and hold the side power button until you see the Polar logo on the screen.

If your M600 still doesn't turn on, contact your local customer service for repair.