About Philips Sonicare F3 Quad Stream nozzle For maximum coverage and an extra thorough clean, use the Quad Stream nozzle to concentrate water into four wide streams between teeth and along the gum line. The soft rubber guide is gentle on gums and every nozzle simply clicks on and off Why its special Sonic technology Pressure sensor Quad Pacer and Smart Timer Other Details Built-in pressure sensor protects your teeth & gums
Especially, ultrasonic toothbrushes appear to remove dental plaque effectively and can considerably improve oral health.
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