BrushSync mode pairing & replacement reminders when used with a BrushSync compatible handle (DiamondClean Smart and ProtectiveClean)Improves gum health up to 100% versus a manual toothbrushGently removes up to 6x more plaque along the gumline than a manual toothbrushIncludes 3 standard Philips Sonicare Optimal Gum Health replacement brush heads