The oclean Air 2 features an ultraquiet design to avoid bothering other people during operation. Inbuilt noise reduction technology and a barely audible brushless motor ensure sound levels are kept at just 30 dB once the brush has been switched on. The compact, light plastic body complies to IPX7 and can therefore be submerged in water for some time. Its smooth, gently curved surface makes the toothbrush comfortable to hold. One click of the controls is sufficient to adjust the toothbrush settings.