Oral-B CrossActionWith CleanMaximiser technology, the bristles from green turn yellow when it's time to replace the head Up to 100% more plaque removal and healthier gums than a traditional manual toothbrush Oral B is optimal for complete mouth cleaning (excluding Oral B iO) Optimally tilted at 16 degrees to get deep into the interdental spaces and remove plaque Compatible with all Oral B toothbrushes except Pulsonic and IO From the brand of toothbrushes used by