The Oral-B Pro 3 3900 electric toothbrush features a rechargeable lithium-ion battery that lasts up to 14 days, a professional two-minute timer with 30-second alerts, and a 360° pressure sensor that turns red and slows the brush speed when you press too hard. It offers three brushing modes: daily clean, sensitive, and whitening.
Key features
Cleaning action: Uses 3D cleaning with oscillating, rotating, and pulsating movements to remove more plaque than a manual toothbrush.
Pressure sensor: A 360° pressure sensor turns red and automatically slows the brush speed if too much force is applied, protecting your gums.
Timer: A built-in professional timer helps you brush for the dentist-recommended two minutes and signals every 30 seconds to switch to a different part of your mouth.
Brushing modes: Includes three modes to customize your brushing:
Daily clean
Sensitive
Whitening
Battery: A rechargeable lithium-ion battery provides up to 14 days of use on a single charge.
Pack contents: The "3900" designation typically refers to a twin pack, which includes two handles (often in different colors like pink and black), two brush heads, and a charging station.
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