The iO 3 electric toothbrush features Oral-B's best technology combining a dentist-inspired round brush head with micro-vibrating bristles for a professional purifying clean feel at home. The Smart Pressure Sensor helps prevent you from brushing either too hard or too softly to better protect your gums. Gum Guard alerts you to time spent brushing with too much pressure. Replace your Oral-B iO toothbrush head every 3 months for the best results. FOR HEALTHIER GUMS IN JUST 1 WEEK with ORAL-B'S MOST ADVANCED TECHNOLOGY: Removes 100% more plaque (vs. a manual toothbrush) PROTECT YOUR GUMS WITH THE iO PRESSURE SENSOR Oral-B's only sensor to signal if you are applying the PERFECT PRESSURE for an effective and safe clean. Always MAXIMISE YOUR CLEAN with the iO LIGHTRING TIMER -that has a dentist recommended 2-minute brush- and REFILL CHANGE ALERT. PERSONALISE YOUR BRUSHING by choosing among 3 CLEANING MODES: Daily Clean Sensitive Whitening. Oral-B ROUND brush heads REACH WHERE RECTANGULAR manual toothbrushes DON'T. Experience a better clean from the #1 brand most used by dentists worldwide. Benefit from a LONG-LASTING CHARGE with the Lithium-ion battery. SWITCH TO ORAL-B ELECTRIC TOOTHBRUSHES CAREFREE: We offer a 30-day money-back guarantee T&Cs and redemption at Oral-B website.