Choose whiter teeth with the Philips Sonicare ProtectiveClean 6100 Hx6877/28. Thanks to the 3 different brushing modes and intensities, you can adjust the toothbrush to your preferences. Do you find it difficult to guess which mode and intensity you should use? Then the BrushSync pairing is ideal. With this technology, the toothbrush knows exactly which attachment you're using and which mode fits it best. For example, you can use the special brush attachment with the bristles placed close together to whiten your teeth in 1 week. Thanks to the pressure sensor, you'll know when you're applying too much pressure. The smart toothbrush also takes note of any wear to your brush attachment. That way, you also know when the brush attachment needs to be replaced.