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    G-Shock and Cardiac frequency with GBD-H1000

    Hello, For a few days I have a G-Shock GBD-H1000 and I would like to know if it is good for my watch to have 24/24 the Cardiac frequency light on ? With this watch the Cardiac frequency can be OFF, ON or ON (RUN ONLY)]. Since yesterday my Cardiac frequency is ON, is is wrong for my watch or...
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