Philips HX3110/00 Sonicare PowerUp Electric Toothbrush with USA Charger Product Description Manufacturer's description: The Philips Sonicare's HX3110/02 PowerUp rechargeable toothbrush is designed to be as easy to use as a manual toothbrush， but is able to remove more plaque. A uniquely angled brush head neck makes it easy to reach back teeth and those hard to reach areas. Thanks to sonic technology more brush strokes occur in 2 minutes compared to a manual toothbrush， helping to break down the build up of plaque. Sonic Technology More strokes in 1 day than your manual toothbrush in a month. Over 15，000 brush strokes per minute. Easy to Use Slim， ergonomic handle is designed to be as easy to use as a manual toothbrush. Familiar brushing motion Familiar brushing motion and brush head shape of a manual toothbrush， but with the cleaning power of over 15，000 strokes per minute.