Phillips Sonicare 7700 Expert Clean Powerbrush, with Bluetooth, has built in sanitizer in charging dock to sanitize the toothbrush head to kill 99% of bacteria and viruses.  The unique sonic sweeping motion is carefully calibrated to create gentle microbubbles that reach deep between your teeth. The head has a pressure sensor,  so you never put too much pressure on your teeth during cleaning. The recharge battery has a 14-day life. Along with being safe and gentle,  the toothbrush is waterproof.  It has 4 different brushing modes to achieve that glowing smile. Download the app to keep.younon a routine,  avoid harmful pressure when brushing,  and keep track of  when to change your brush heads. A1.