Philips Sonicare Protectiveclean 4100 sells on Amazon. I   think the price is very good. Please read some of the reviews and see what people thought of the product. Do check how you might qualify for a free shipping offer if available.

  • Removes up to 7x more plaque vs. A manual toothbrush
  • Pressure sensor protects teeth and gums from excess brushing pressure. Speed – up to 62000 brush movement/min
  • Always know when to replace your brush head for an effective clean with brush sync replacement reminder
  • Quad pacer and smart timer helps ensure dental professional recommended two minute brushing time and encourages brushing in each quadrant of the mouth
  • Batter charge indicator light let’s you know when to recharge; 2 week battery life

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