The Oral-B PRO 900 Sensi UltraThin electric toothbrush offers clinically proven, more thorough cleaning than a conventional manual toothbrush. The round flower shape of the brush head was developed together with dentists. The combination of soft, ultra-thin bristles and conventional bristles is gentle on the gums and strong against plaque. The Sensi UltraThin brush head removes up to 100% more plaque and reduces gingivitis by 100% compared to a conventional manual toothbrush. The unique combination of rounded and ultra-thin bristles is ideal for sensitive gums. The Oral-B PRO 900 Sensi UltraThin has 3 different cleaning modes: daily cleaning, sensitive and gum protection. The timer indicates when the cleaning time of 2 minutes recommended by dentists has been reached. Oral-B - the toothbrush brand most commonly used by dentists worldwide. Compatible with the following brushes: CrossAction, 3DWhite, Sensitive, Sensi UltraThin, Precision Clean, Deep Cleaning and TriZone.