Clinically proven and dermatologist tested to remove 98% of environmental toxins, 30% redness reduction, and 30% visible pore size reductionSonic advantage: Brush head operates at 300 oscillations per second for professional facial cleansing actionGentle enough to use as part of an everyday cleansing regimen keeping skin clear and preventing clogged pores and blackheads from developingAutomatic even cleanse timer tells you to move to another area of your face every 10 seconds; The unit beeps every 10 seconds of treatment to suggest a different quadrant of your face and shuts off after 1 minute of use with 2 beepsWaterproof and safe for use in the shower