Superior whitening: Clinically proven to remove up to 100 percent more stains in 7 days than a manual toothbrush Genuine replacement heads: No generic replacement brush head claiming to fit handles is clinically tested & proven to remove up to 100 percent more stains than a manual toothbrush Gentle and effective: Soft, densely packed bristles remove surface stains and whiten your teeth, while gently protecting your gums. Brush head system: Click-on Special design: Up to 7x more plaque removal versus a manual toothbrush No guessing: Built in brush head replacement reminder lets you know when to replace your brush head