Philips sonicare ProtectClean HX6403/70 Manual page 37

Pressure sensor
1 When attaching a new smart brush
head for the first time the brush head
replacement reminder light blinks green
three times. This confirms you have
a Philips brush head with BrushSync
technology.
2 Over time, based on the pressure you
apply and the amount of time used, the
handle will track brush head wear in
order to determine the optimal time to
change your brush head. This feature
gives you the guarantee for the best
cleaning and care of your teeth.
3 When the brush head replacement
reminder light lights up amber, you
should replace your brush head.
To deactivate the brush head replacement
reminder see 'Activating or deactivating features'.
Your Philips Sonicare is equipped with
an advanced sensor that measures the
pressure you apply while brushing. If you
apply too much pressure, the toothbrush
will provide immediate feedback to indicate
that you need to reduce the pressure. This
feedback is given by a change in vibration
and therefore brushing sensation.
To deactivate the pressure sensor see
'Activating or deactivating features'.
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English