Profoon PDX-2708 User Manual page 3

BOOST button: during a call, press to enable the extra amplifier
and buttons: during a call, press to increase or decrease the volume
in standby mode, press to open the menu during setup, press to confirm your
settings
press to answer an incoming call or to start a phone conversation
during a call, press again to enable or disable the speaker function
in standby mode, press to open the Caller-ID memory
press to scroll memories or settings
during a call, press to increase the volume
in standby mode, press to open the last dialled number memory
press to scroll memories or settings
during a call, press to decrease the volume
correction button when entering phone numbers or names
during a call, press to switch off the microphone
in stand-by mode, press to start an intercom call
during setup, press to go back one step
press to end a call
press and hold (> 5 sec.) to switch off the handset
0-9 buttons: to dial phone numbers and to enter memories
0 button: press and hold to insert a dialling space
'asterisk' and 'pound' buttons: used for e.g. telecom banking
R button: function button for certain telecom services
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