The Philips Sonicare 9900 series are the most extensive Philips toothbrushes. With the SenseIQ technology, they read your brushing behavior and automatically choose the right intensity. In total, the 9900 models have 8 different brushing modes. These toothbrushes also give feedback on the brushing pressure and if every part has been brushed well via the light ring and the display. View the Sonicare 9900 Series and choose a toothbrush color that suits you.