ENHANCED CLEAN: Achieves cleaner teeth and healthier gums by removing more bacterial plaque than a manual toothbrush with Oral B electric toothbrushes heads X-SHAPE BRISTLES: Genuine Oral B electric toothbrush heads feature unique X-shape bristles that clean in areas regular ones cannot reach for optimal cleaning efficacy DEEP CLEANING: Oral B toothbrush head cross action features 16 degree angled bristles to adapt to each tooth for deep cleaning COMPATIBLE FIT: Fits with Oral B toothbrush heads for Oral-B electric rechargeable toothbrushes except Pulsonic and iO models USAGE INDICATOR: Brush head usage indicator changes from green to yellow reminding you when to change your Oral B replacement heads to maintain full cleaning efficacy