The Oral-B iO Series 6 rechargeable toothbrush combines powerful, yet gentle micro-vibrations with Oral-B's unique dentist-inspired round brush head design for a professional clean feeling every day. The Smart Pressure Sensor indicates optimal cleaning pressure to protect gum and enamel. AI Recognition using an interactive display recognizes your brushing style and guides you to better brushing every day. The built-in 2-minute quadrant timer pulsates every 30 seconds, ensuring a complete clean. The frictionless, smooth magnetic drive system transfers energy to the bristle tips. Replace your Oral-B iO Series Replacement Brush Heads every 3 months for best results. Toothbrush has a 60-day money-back guarantee and 2 year warranty from Braun Oral-B.