The S750 Rechargeable sonic toothbrush features a built-in UV sanitizer designed to kill 99.9% of bacterium and germs on the brush heads. The toothbrush’s sonic wave technology provides 40,000 sonic strokes per minute to effectively remove plaque without irritating your gums. The innovative design is sleek and efficient. It is ideal for those hard-to-reach areas and removes even the toughest stains to leave your teeth naturally whiter! The system includes 12 bonus brush heads- that’s 3 years worth of brush heads based on dental professional recommendations to replace your brush head every 90 days.