this review title is: great purchase and the content is: you will notice whiter teeth within days your teeth feel cleaner gums feel tougher and battery life is amazing it will go up to weeks on one charge it has a built in timer so you know how long to brush each quadrant of your mouth it also has speeds for sensitivity great purchase a must have for anyone that is particular about oral hygiene.there are other information for this review, one is this reviewer did purchase it and the other is 1 people think this review is helpful.