The Colgate Smart Electronic toothbrush will notify you when to change quadrant when brushing your teeth offline (without use of the app).
(Each quadrant is one of the four zones of your mouth: top left, top right, bottom left, and bottom right).
When the brush stops briefly, this is your signal to change zone.
There will be three indications to change zone when brushing. This therefore divides brushing into four phases of equal length, no matter the duration chosen (by default it is two minutes, or a duration between two and five minutes).
The toothbrush will stop very briefly three times to notify you that the selected brushing length has passed, but it will continue to work until you manually switch it off.