Bristles conform to your teeth, removing plaque and stains for a whiter, brighter smile. The Philips Sonicare Premium White brush head features densely packed bristles that effectively remove plaque and surface stains from everyday foods and drinks. The flexible sides ensure a secure fit, even on uniquely shaped teeth and gums. The brush head conforms to the unique shape of your teeth and gums. The flexible rubber head conforms perfectly to the contours of your teeth, gently reaching hard-to-reach areas. It absorbs excessive brushing pressure, preventing gum injury even if you brush too hard. The ultrasonic water jet, which utilizes saliva to generate a powerful ultrasonic water jet at approximately 31,000 vibrations per minute and a wide amplitude, gently and thoroughly removes plaque. Brush Head Replacement Reminder: The brush head records your brushing time and pressure each time you brush, and a reminder light on the bottom of the handle will light up when it's time to replace your brush head. Rigorous brush head testing protects your oral health. Philips Sonicare ensures peace of mind by conducting quality tests on every brush head, including usability and durability. Compatible with all Philips Sonicare electric toothbrushes. Sonicare handles are compatible with other brush heads, so try different brushes on your existing handle to find your favorite. (Excluding Sonicare Kids and e Series.) Brush Head Recognition: The RFID-enabled microchip built into the brush head connects to the handle, automatically setting the optimal brush mode and intensity level* simply by attaching the brush head to the handle. (DiamondClean Smart and ProtectClean compatible. Mode and intensity can be adjusted to your preference.)