Optimal Plaque Control brush head removes up to 6x more plaque vs manualPremium Plaque Control brush head removes up to 10x more plaque vs manualMode pairing chooses best modeReplacement technology tracks brushing habits and alerts when to replaceDentists recommend replacing your brush head every 3 monthsIncludes 2-Optimal Plaque Brush Heads, 1-Premium Plaque Brush Head