Philips HX9553/02 User Manual page 10

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The bottom LED burns yellow: the Quadpacer is not active.
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4 To select the desired setting, release the button when the LED that
corresponds to your choice lights up.
Note: If you select the 2.5-minute Quadpacer, fewer brushings are available
from a fully charged battery.
Dual Speed control
The Dual Speed Control feature allows you to choose between 2 speed
settings: normal speed ('Max') for optimum brushing performance or
reduced speed ('Gentle') when you desire an even more gentle brushing
action.
Each time you switch on the Sonicare, it starts to brush at the normal
speed setting.
1 To switch from normal to reduced speed, press the Dual Speed
Control button once during brushing.
 To switch from reduced to normal speed, press the Dual Speed
Control button a second time during brushing.
A distinctive two-tone beep indicates that the speed setting has been
changed.
We advise you to brush at the normal speed setting to maintain optimal
results.
Note: While the Easy-start feature is activated, the Dual Speed feature
(Gentle and Max speed modes) does not function. To use the Dual Speed
feature immediately, deactivate the Easy-start feature (see section 'Easy-start'
in this chapter).
Make sure you select the normal speed setting when the Sonicare is
used in clinical trials.
cleaning
Regular cleaning guarantees the best performance and a long life for the
appliance.
1 Rinse the brush head and bristles after each use. Let the brush head
air-dry only.