The oral b trizone toothbrush head is made to deliver the superior results of a power toothbrush but helps you brush as you would with a manual brush for easy handling it even features 3 bristle zones for a comprehensive clean dynamic angled power tip designed to access hard to reach areas like the very back teeth non sweeping bristles pulsate on the entire surface of your teeth to fight plaque build up sweeping pulsating bristles reach deep between teeth for a stimulating