Philips Sonicare Prestige 9900 HX9992 removes up to 20x more plaque and improves gum health up to 15x more in just 6 weeks compared to a manual toothbrush. Sonicare Prestige gives real-time feedback when too much pressure is applied when brushing teeth or scrubbed too much. The handpiece vibrates and the end of the handpiece turns purple when pressure is too strong or yellow when scrubbed. The revised Sonicare app analyses collected data, provides individual optimisation suggestions and overviews and gives tips in the newsfeed. 2,000 brush head movements/minute create a fluid flow that reaches deep into interdental spaces and aids cleaning.