Dual brush heads included – 3100 – 2 x, Deep sonic cleaning – 3100 – 2 x, Reduces stains gently – 3100 – 2 x, Easy to use – 3100 – 2 x

Custom cleaning settings – 6100 Electric, Adaptive intensity levels – 6100 Electric, Smart timer feature – 6100 Electric, Improves overall oral hygiene – 6100 Electric

Smart brushing feedback – DiamondClean Smart 9400, Premium brush heads – DiamondClean Smart 9400, Deep cleaning modes – DiamondClean Smart 9400, Connected app support – DiamondClean Smart 9400