Sigma ROX 4.0 Short Manual page 14

TRAINING
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Press START button for 3s to start the device.
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Don't move and search for clear sky location for fast GPS fix.
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Wait for „GPS OK". Press START button to start the training session.
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Press START button to stop the training session.
5
Hold „+" button to reset training values and save your training.
6
Sync with Smartphone for full data analysis and sharing.
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SIGMA RIDE App