5 High-Performance Brushing Modes: Clean (gentle), White (strong), Polish (strong invert frequency), Milder (gentle invert frequency) and Sensitive (soft) to suit different conditions of teeth of gums, so you can choose different modes according to your preferences and dentist's recommendations. The 5 brushing modes offer a tailored cleaning experience that suits your unique oral care needs. The built-in 2-minute timer and 30-second reminder function ensures a scientifically-recommended brushing time. The electric toothbrush gently pulses fluid between the teeth and along the gum line for a gentle and effective clean every time. QTY over 800 ship by sea.