Bullet Points : 1 > Designed With You In Mind, Philips One Is A Big Step Up From Manual Brushing. Battery Life Up To 30 Days 2 >Micro Vibrations And Tapered Bristles Made Of Soft Nylon Gently Polish Teeth For A Brighter Smile 3 >Take Your Manual Brushing Experience To The Next Level By Pairing Regular Brush Motions With Bristle Micro-Vibrations 4 >2 Minute Timer With 30 Second Notifications 5 >Dentists Recommend Replacing Brush Heads Every 3 Months Description : Philips One By Sonicare Rechargeable Toothbrush, Shimmer, Hy1200/05Shimmer