Crisscross bristles. More cleaning action in every stroke. Rechargeable: Sustained power for a consistent clean everyday. Replaceable brushhead. More cleaning action in every stroke - and every stroke fully charged for effective performance; Rotating PowerHead loosens and whisks away plaque from surfaces, gumline and back teeth; Multi-Angled CrissCross bristles reach deep between teeth to lift out and sweep away plaque; Replaceable Brushhead with One-Touch release and lock button; Plugged-In Charging Unit: Rechargeable - Ideal for travel lasts more than 2 weeks between charges when brushing two times a day for two minutes each.