Braun Oral-B D17535 3D Excel ProfessionalCare 7550 toothbrush bonus pack. 3 FlexiSoft brushheads with Advanced Bristle System: FlexiSoft bristles: thoroughly clean and polish teeth. Longer Interdental tips: clean deep between teeth and below the gumline. Indicator bristles: color fades reminding of brushhead replacement need. Two-minute brushing timer: signals after two minutes recommended brushing. You can switch the product off briefly wihtout resetting the timer. Pressure Sensor: helps you protect your gums from excessive brushing force. Anti-slip grip. Brushhead storage: hygienic storage for up to 4 brushheads. Rechargeable - long lasting charge. Ideal for travel lasts 12 days between charges when brushing two times a day for two minutes each. No replacement of batteries required.