What is 'quadrant buzz' and how do I turn it on?

Quadrant buzz is a feature that will cause the brush to buzz at 30-second intervals, prompting you to switch and brush a different quadrant of your mouth. This helps make sure you spend an equal amount of time brushing each section or quadrant of your mouth. To turn it on, go to the Profiles screen of the app, swipe down to Settings and toggle on the 'Quadrant Buzz' feature.

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