This electric toothbrush features advanced sonic cleaning technology, producing 37,000 brush strokes per minute for a powerful  dynamic cleaning action, reducing plaque better than a manual or an oscillating toothbrush, keep your teeth stronger and healthier.  Electric Toothbrush Product Features:  1. 3 brushing modes offer varying oral care needs: (Press the button 2 seconds for each mode changing)  ** Clean: Meets your regular cleaning needs.  ** Soft/Sensitive: Perfect for sensitive teeth and first-time users, as well as children 8 years or older.   ** Massage: Massages the gums  Press the button 2 seconds for mode changing.   2. The 2 minutes auto brushing time and the 30 seconds timer reminds you to switch quadrant. Each mode works 2 minute, 0.25 second pause for every 30 second.   3. This Electric Toothbrush can work up to 4 weeks a single charge of 24 hours.  4. Battery level indicator:  A flashing light indicates charging required.