Assertion: electric toothbrush's timer | /r/CapableOf | make sure
Facets:
Source sentences:
text: The electric toothbrushes have timers and pacers which make sure that you brush your teeth for two minutes and that you brush all four quadrants of your mouth so you don’t miss out on any spots.
text: With the app, you still get real-time feedback through the LED ring and a timer to make sure you brush all four quarters of your mouth.
text: Some electric toothbrushes offer features that most manual brushes do not, such as a whitening mode that polishes the teeth, or a timer that makes sure you brush your teeth for the full two minutes recommended by the ADA.