The S520 oral care system includes a rechargeable toothbrush designed with sonic wave technology that provides 40,000 sonic strokes per minute to effectively remove plaque without irritating your gums Its ideal for those hard-to-reach areas and removes even the toughest stains to leave your teeth naturally whiter It comes with a 2 minute timer with a 30 second vibrate alert in order to remind you to brush a different quadrant of your mouth, The 4 color coated brush heads are great to share this product with up to 4 different users The storage case can hold up to 6 brush heads Features: sonic wave technology, 40,000 ultra powerful strokes per minute, removes microscopic plaque left behind by other toothbrushes, three modes, powerclean, softgentle and massage modes, east-to-remove toothbrush heads, multiple colored toothbrush heads for easy identification for shared use, dockingcharging station with enclosed sanitary toothbrush head holder, includes 12 replacement toothbrush heads, 1 year warranty, avoid being locked in with other toothbrush manufacturers with expensive replacement heads Our toothbrush includes 12 heads After that, replacement heads will always be affordable For replacement heads, see model No# RB58 Whats in the box: Pursonic S520 ultra high powered sonic electric toothbrush, charging dock with Ac adapter, 12 brush heads, 2 hygienic travel caps, 2 interdental brush heads, 2 tongue cleaners, 2 floss holders, 1 year warranty, user manual