The Emerson Scalp Massager features an innovative massage module that generates a feeling of being massaged by a professional massage therapist - without the expense! This cordless massager has 4 rubber massage heads, each with seven finger-like nodes that rotate clockwise and counter clockwise at various speeds. The coordinated, precise movements deliver a soothing massage to your scalp and head. May also be used to massage the neck, shoulders, back, legs, and any other part of the body that needs relief and relaxation. The massager's waterproof design makes it ideal for use in the shower or bath.