Crisscross bristles. More cleaning action in every stroke. Replaceable. Battery included. More cleaning action than the leading manual toothbrush. 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 Brush Head with One-Touch release & lock button. Battery powered. 1 Replaceable Duracell AA battery included.