Акку-Чек Перформа Нано - Manual (Page 48)

2. Press and hold until
“set-up” appears on the
display.
3. Press and release
repeatedly until you
reach the display with
“set-up” and “OFF,” and
the flashing
.
4. Press and release
or to switch
between “On” and
“OFF.” Press and
release
to confirm
your choice.
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