Accu-Chek Performa Nano Owner's Booklet page 45

4. Press and release
or to switch
between "On" and
"OFF." Press and
release to confirm
your choice.
5. If you select "On," the
hour flashes. "A-1" and
the bell symbol remain
on the display.
6. Press and release
or to select the
hour. Press and release
to confirm the hour.
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