The Colgate Adult Powered Battery Soft Toothbrush has a spellbinding power of 30,000 brush strokes per minute. The rubber polisher helps to remove surface stains and it has a tongue and cheek cleaner. It brushes away more plaque* (*vs a manual toothbrush). Includes 1 AA Battery TO USE: Press on/off button to activate the vibrating bristles with the cleaning power of sonic technology. TO CLEAN: After use, rinse toothbrush head thoroughly, shake off excess water, and store upright. TO REPLACE BATTERIES: Firmly hold the bottom of the handle while rotating the top counterclockwise. Insert one AA battery as indicated inside the brush handle and firmly rotate clockwise back into position to close. TO REPLACE BRUSH HEAD: Gently pull the brush head from the handle and press new brush head into place. Colgate refill toothbrush heads are compatible with any Colgate battery-powered toothbrush Dentists and Hygienists recommend replacing your toothbrush refill head every 3 months.