Swiss SION Manual De Usuario página 44

Enter the sleep page. The static
icon can be seen in the page
to indicate the sleep monitor isn't
started up;
Double click the button to start up
the sleep monitor.
The dynamic icon appears and
the sleep monitor is started up;
long press the button to start up
the heart rate monitor at
the same time till the heart rate
value appears within several
seconds. Double click it again to
finish the sleep monitor.
Upon starting up the sleep
monitor, the icon appears in
the clock page.