Advanced cleansing system. 2-speed facial cleansing brush + exfoliating renewal cleanser. 2 AA batteries included. Professional Skin Expertise: Leading dermatologists and Olay skin scientists have partnered to establish the Olay Professional Alliance. Through this partnership. Pro-X was created to bring you prescribed regimens to treat your specific skin care concerns. Advanced Cleansing System: Cleanses skin 6x better (vs. basic cleaning) and helps maximize the immediate hydrating effectiveness of your anti-aging moisturizer. Professionally designed with the following features: 2-speed, rotating system delivers daily deep cleansing and gentle exfoliation. Water resistant for use in the shower. Replaceable soft bristle brush head (included). Refills available. Pro-X Exfoliating Renewal Cleanser (sample included) recommended for daily exfoliation. Cleansing brush can also be used with a broad range of Olay cleansers for daily deep cleansing. 2 AA batteries also included. Made in China.