A brush that learns and adapts to how you brush, for your most complete clean yet. Philips Sonicare Prestige 9900 with SenseIQ technology is our most advanced electric toothbrush. Sensing your every move and adapting to your needs in real time for exceptional care. As you brush, pressure, motion, coverage and more are monitored up to 100 times per second. The brush then adapts automatically in real time for advanced teeth and gum care.