The Philips Sonicare Xtreme Battery-Operated Toothbrush delivers the oral health benefits of other Sonicare toothbrushes, with a special emphasis on portability. Safe, comfortable, and effective, the Xtreme encourages healthy oral hygiene habits for life. Patented Technology and Dynamic Fluid Action Like all Sonicare toothbrushes, the Xtreme was inspired by dental equipment and creates a fluid and dynamic cleaning action. A series of tiny but powerful waves dislodge plaque that isn"t normally reachable by either a manual brush or the oscillating and rotating movements of other power brushes. In fact, the patented technology behind the Xtreme"s cleaning action can actually make it easier to clean plaque below the gum line. The bristles on this brush play an important role, too. Their high velocity movement results in direct contact with each tooth to cover more area in less time. These bristles are also designed to be extra gentle on teeth and gums. Proven to Deliver Brushing Compliance In clinical tests, subjects brushed measurably longer with the Xtreme than with a manual toothbrush. Easy and comfortable to use, thanks to the contoured brush head, the Xtreme also features a Smartimer that automatically shuts off after the two-minute dentist recommended brushing time. Most importantly, the Xtreme is highly effective; studies show that it removes more plaque than using other toothbrushes. And thanks to Sonicare"s no risk, 100% satisfaction guarantee, your teen has everything to gain with better dental check-ups.