With CleanMaximiser technology, green bristles turn yellow when it is time to replace your brush headUp to 100 Percent more plaque removal and healthier gums vs. a regular manual toothbrushOral-B’s best for deep interdental cleaning (excluding Oral-B iO)With MicroPulse bristles which loosens plaque and provides optimal tooth coverageCompatible with all Oral-B handles except Pulsonic & iOFrom the #1 brand recommended by dentists worldwideNumber of toothbrush heads included in this pack: 4