Oral B iO series electric toothbrush Model: io8 /io9 white/ io9 Pink Difference: 1. i08 has 6 modes. iO9 has 1 more tongue cleaning mode, 7 modes in total 2. Io9 travel box has charging function, io8 travel box doesn't 3. Io9 has 3D tooth surface monitoring function, io8 does not 4. Io9 with two brush heads, gentle care + ultimate clean. Io8 has only one ultimate clean brush head 5. Io8 and io9-white have brush head protection box, but io9-pink doesn't Features: 1. IO micro vibration technology makes every brush vibrate, and the cleaning ability of gum is increased by 6 times 2. AI interaction, 2-minute timing, detection of 6 oral areas, APP detection and guidance of brushing 3. Multiple modes meet the needs of different clean needs 4. Smart pressure sensor, appropriate intensity of green light, excessive intensity of red light 5. Magnetic induction charging base 6.3 hours fast charging, 12 days long battery life, twice a day, 2 minutes each time 7. 2020 red dot award winning design, super quiet Brush head: Io8 has only one ultimate clean brush head, io9 has two: 1 ultimate clean, 1 gentle care Ultimate type: 3700 heel bristles, tuft in tuft design, 16 °angle arrangement, professional cleaning gum line, crevices and other hard to reach areas Gentle care type: 4000 bristles, a circle of super soft bristles on the outside, curved cutting of bristles, fitting tooth curve, suitable for sensitive teeth