The Pursonic RET20USB Rechargeable Electric Toothbrush efficiently delivers 8,800 strokes per minute for properly cleaning teeth. The one button operation offers 3 brushing modes to suit any kind dental situation. The 2-minute timer encourages you to brush for the dentist recommended time, while a 30-second interval timer gently pauses to remind you to thoroughly brush all areas of your mouth. Toothbrush includes 3 brush heads.