Philips Sonicare ProtectiveClean 5100 uses unique sonic technology which drives fluid deep between teeth along with specially designed brush heads to gently but effectively remove plaque in between teeth and along the gum line. Simply brush for 2 minutes twice a day for increased plaque removal for healthier teeth and gums in 2 weeks, versus a manual toothbrush. The in-built pressure sensor alerts you when you are brushing too hard to ensure that you do not damage your teeth and gums.