Philips Sonicare DiamondClean Smart 9400 HX9917/88 electric sonic toothbrush, 62000 movements/minute, 4 cleaning modes, 3 intensity levels, pressure sensor, BrushSync function, 2 charging bases, 2 brush heads, White All-in-One brush head for complete careClean without compromise with the A3 Premium All-in-One brush head. Our best ever has angled bristles to help remove up to 20x more plaque, even in hard-to-reach areas*. Triangular tips work to remove up to 100% more stains in less than two days***. And longer bristles clean deep for gums that are up to 15x healthier in just two weeks**. All without ever changing brush heads. Did you know that brush heads become less effective after 3 months of use? Our BrushSync™ feature can remind you when it’s almost time for a replacement. Up to 7x more gums**** in just 2 weeksClick on the G3 Premium Gum Care brush head to improve your gum health. Its smaller size and targeted gumline bristles provide a gentle yet effective clean along the gum line, where gum disease begins. Clinically proven to produce up to 100% less gum inflammation**** and up to 7x more gums in just two weeks.**** Start and maintain healthy habitsDiamondClean 9000 gives you the guidance you need to improve and maintain healthy brushing habits between dental checkups. Built-in smart sensors let you know when you're using too much pressure, and by connecting your brushing experience to the Sonicare app, a personalized progress report helps you stay on track and see how much you've improved over time. Personalized brushing experience DiamondClean 9000 comes with Clean, White+, Gum Health and Deep Clean+ to take care of your brushing needs. Clean mode is for exceptional everyday cleaning, White+ is for stain removal, Gum Health provides a gentle but effective clean for gums, and Deep Clean+ gives you an invigorating deep clean. Three intensities let you choose between a higher setting to enhance your clean and a lower one for more sensitive mouths. Lets you know if you're pressing too hard You may not notice if you're brushing too hard, but DiamondClean 9000 will. If you need to relax, your toothbrush will emit a pulsating sound. It's a reminder to let the brush head do the work. 7 out of 10 people found that this feature helped them become a better brusher. BrushSync automatically selects the best mode for youSmart brush heads ensure you’re using the right mode and intensity for the best possible clean. For example, let’s say you’re using the W3 Premium White brush head. The DiamondClean 9000 BrushSync technology will automatically sync your brush head to White+ mode to help whiten your teeth. Always know when to replace your brush headsAll brush heads wear out over time, so you’ll want to keep an eye on yours to make sure you’re still getting a great clean. Our BrushSync technology tracks how long you’ve used your brush head and how much you’ve brushed. The BrushSync replacement reminder on the handle and a short beep remind you when it’s time to replace it. Simple to charge and stylish to turn onThe DiamondClean 9000 will last up to two weeks on a single charge with regular use.