The ultra-quiet Oclean Air 2 cleans teeth deeply. Easy-to-use modes can be switched with a single button. Press for 2 seconds to switch to the gentle or clean mode as needed. The Pedex Triangle bristles with a three-dimensional shape adapt better to your mouth and provide an effective cleaning action compared to 20% of regular bristles. The original Whisper Clean ultrasonic technology for noise reduction is powered by 20,000 Hz ultrasonic signal technology, which suppresses noise and offers the user a quiet and pleasant brushing experience.