Clarisonic's smallest one speed wonder, Clarisonic Mia 1 is the perfect start to sonic cleansing. Unlike spinning devices, our patented sonic technology works with skin’s natural elasticity, oscillating at a sonic frequency that produces over 300 movements per second. The resulting flexing action works to loosen dirt and oil, removing deep-seated impurities from pores and priming skin to better absorb topical treatments. Also rechargeable and waterproof. Features: 1 Speed (Universal) Interchangeable Facial Brush Heads. 1 Year Warranty. Included: Sensitive Brush Head. Sample Size Refreshing Gel Cleanser (1 oz) Universal Voltage pLink Charger. Clarisonic Cleansing by the Numbers: 6X more makeup than manual cleansing. 300 Movements per second. 61% Greater absorbtion of Vitamin C after use. 2X daily use is proven safe and gentle.