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Troubleshooting
Heart-rate signal missing
Cube continuously tracks your heart rate while you're
exercising and throughout the day. If the heart-rate sensor on
your watch has difficulty detecting a signal, the green light on
the back of the watch will continue to flash continuously.
Next, please make sure you're wearing your watch correctly,
either by moving it higher or lower on your wrist or by
tightening or loosening the wristband. Cube should be in
contact with your skin.
After holding your arm still and straight for a short time, you
should see your heart rate again.
