With the Philips Sonicare DiamondClean 9000 HX9911/88 Aquamarine, you can effortlessly switch from a manual toothbrush to an electric toothbrush. The sonic brushing motion is a technique that's easy to master. Thanks to the 4 different brushing modes, you can easily adjust your brushing session to your needs. With the included Premium Plaque Defense brush attachment, you can clean your teeth even more thoroughly. That's because the brush hairs move according to the shape of your teeth. To improve your brushing technique, you get feedback in the accompanying Sonicare app. It's also connected to the pressure sensor and the timer of the toothbrush. On top of that, BrushSync notifies you when you need to replace the brush attachment. That's useful if your smile is your signature.