HX3631/04. Simple gentle superior (plaque removal vs. manual toothbrushes). A month's worth of brush strokes in a day. No. 1 recommended brand by dental professionals. PowerUp is designed to be as easy to use as your manual toothbrush, while delivering superior results and a better experience. With more brush strokes in a day than your manual toothbrush can do in a month, PowerUp removes more plaque, helps reduce cavities and helps improve gum health. The result is your best smile. And the confidence that comes with it. Reminder bristles. Bristles fade when a replacement is needed. Better check-ups guaranteed. PowerUp handle can be used with: regular; soft. www. philips.com/sonicare. UL listed. Recyclable packaging material. Listed personal hygiene appliance 1T26. 3VDC (two  AA alkaline 1.5 volt batteries). Made in China.