Sonic Pulse Technology channels up to 11,000 high-intensity pulsations per minute Brush head combines silicone and PBT polymer bristles, strong on plaque but gentle on gums 16 adjustable cleansing modes 365 days of brushing per 1-hour charge USB-chargeable, no charging dock required Durable, hygienic brush head lasts twice as long as nylon toothbrushes