VYVO vista, Quick Start Manual

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3. INTRODUCTION FOR IMPORTANT FEATURES
3.1. Heart rate monitoring
VISTA contains PPG heart rate sensor and combines it with
HR algorithms, which accurately monitors your heart rate
during exercise.
1. in order to monitor heart rate more accurately, please wear
the watch approximately one finger away from the wrist bone.
2. When exercising, please wear tight or as comfortably close
to your skin as possible, and make sure that the watch does
not slide or move along with the movement.
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