They say variety is the spice of life and the 4" Athena Waterproof Mini Massager proves it. A small but powerful waterproof plastic massager with four soft interchangeable heads for different types of stimulation, the Athena Waterproof Mini Massager is recommended by Dr. Laura Berman, famous for her appearances on 'The Oprah Winfrey Show'. Waterproof and Phthalate free, the Athena Mini-Massager uses one AA battery.