The Philips Sonicare Premium white brush head gives you a whiter, brighter smile. designed to work with all click-on sonic are models, these replacement brush heads have polishing bristles that remove surface stains to visibly whiten teeth in just 3 days, while you get an exceptional deep clean. Use with a Philips Sonicare BrushSync(TM) compatible handle (Diamond Clean Smart or protective Clean) to unlock Smart features: BrushSync mode-pairing triggers your handle to select optimal mode and intensity level for exceptional plaque removal (certain models only) BrushSync replacement technology tracks how often and how hard you brush and will notify you when it is time to replace your brush head. essential oil Warning: toothpaste containing essential oils can damage your brush head. Avoid direct contact with products that contain essential oils or coconut oil. Use MAY result in bristle tufts dislodging. reminder bristles fade to let you know when it's time for replacement. Replace your brush head every 3 months as recommended by the American Dental Association. A fresh brush head every 3 months maximizes the effectiveness of Philips unique sonic are technology.