Oral-B iO9 Electric Toothbrush with Magnetic Technology and Micro-Vibrations, Artificial Intelligence, LED Display, Smart Pressure Sensor, 7 Modes, 1 Head, Refill Holder, Travel Kit with Charger, Black + 2 Brush Heads Micro-Vibrations Inspired by dentists, the round brush head gives you a superior clean with micro-vibrations and oscillating action. Gum ProtectionThe smart pressure sensor displays a red light when you brush too hard and green when you brush correctly. Fast Charging StationThe magnetic “lock-in-place” charger ensures a full charge in approximately 3 hours. Sensational Oral-B iO combines the round brush head with a gentle cleaning of the bristles with micro-vibrations.