6500 Series sonic toothbrush combined with the C3 Two-in-one electric toothbrush head. Enjoy a powerful yet gentle clean, even in those hard-to-reach areas. This rechargeable toothbrush uses the Next-Generation Sonicare Technology. The motor adjusts power automatically, so there is zero drop in performance when you reach those harder-to-clean areas. Enjoy a gentle yet effective clean for your teeth and gums with 62,000 bristle movements per minute.