Oral-B iO 2 combines gentle micro-vibrations with a dentist-inspired round brush head to deliver a professional-feel clean. Choose from three quiet intensity levels—extra-gentle, gentle and daily clean—and use the one-touch control for easy operation. The built-in gum pressure sensor slows the motor and signals red if you brush too hard. Brush for the recommended time with the 2-minute timer and 30-second zone alerts. The handle features a long-lasting battery with low-charge indicator. Replace the Oral-B iO brush head every 3 months for best results.