What is Philips Sonicare 3100 Series Electric Toothbrush Black? 1 The Series 3100 with our unique technology brings you a powerful yet gentle clean 2 Up to 3x better plaque removal vs a manual toothbrush 3 Built-in pressure sensor protects your teeth & gums 4 Always know when to replace your brush heads with the brush head replacement reminder, based on actual use. 5 Optimise your brushing with SmarTimer and QuadPacer vs. a manual toothbrush Up to 3x better plaque removal Advanced Sonic Technology Powerful bristle vibrations drive microbubbles deep between your teeth and along your gum line for a refreshing experience. You will get two month's worth of manual brushing in just 2 minutes. 31,000 brush strokes per minute gently clean your teeth, break up plaque, and sweep it away for an exceptional daily clean. Removes up to 3x more plaque The Sonicare electric toothbrush with advanced sonic technology is clinically proven to remove plaque up to 3X better than a manual toothbrush. It removes plaque from your teeth and along the gum line, without being harsh and whilst protecting your gums. Protect your gums Built-in pressure sensor automatically detects pressure you apply, warns you, and reduces the toothbrush vibrations automatically to help protect your gums. The toothbrush will make a pulsing sound as a reminder to ease off the pressure. BrushSync replacement reminder All 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 been using your brush head for, and how hard you've been brushing. The BrushSync replacement reminder on your handle and a short beep gives you a heads up when it's time to replace it. SmartTimer and QuadPacer 2 minute SmarTimer and 30-second QuadPacer guide you to brush for the recommended time in all areas of your mouth to ensure a complete clean. Designed around you Slim, light-weight, and ergonomic design makes the toothbrush easy to hold and use so that you can get an amazing clean without any strain. Long lasting battery life Battery life lasts up to 14 days so you can go long periods without charging. Easy-start Our Easy-Start program gives you the option of a gradual, gentle increase in brushing power the first 14 times you use your new toothbrush. Goodbye adapter. Hello USB. Power adapters may seem small, but added together, their plastics make a huge impact on the environment. By switching to USB charger in our Philips Sonicare 1000-4000 Series alone, we can use up to 189,210 kg less plastic every year. That's powerful, right?