Dermatologist-developed. Sonic movement offers deep yet gentle cleansing. Two bristle types for targeted cleansing in hard-to-reach, contoured areas of the face where dirt hides. Waterproof. Swiss engineered. For all skin types. How to use: Use once daily for 30 seconds. Build up to one minute, twice daily Apply cleanser to moistened skin or brush head Massage in circular motion for 15 seconds on cheeks using white bristles Massage in up-and-down motion for 15 seconds on T-Zone using green bristles. Rinse and pat dry. Exfoliate and moisture. Rinse brush head after each use.