Use for Knee, Back, Neck, Feet Power Source Manual massager Material Plastic Brand Lonaar Special Feature Waterproof Massager form Massage Ball Product Benefits Pain Relief Is It Cordless? Yes Product Grade Home Style Modern See less About this item Use Power Ball For Pain Control Ans Total Health as it Works on Proven Acupressure Principle As Shown In The illustrated Effective on Knee Back and body aches and for general fitness Keep One More Of Your Balls Under Your Neck And Do Deep Breathing For About 2 Minutes Before Going To Sleep, This Will Lead To Sound Sleep You Can Rest Your Hand On Your Power Ball For Extra Energy IN THE BOX-: 1 Set Magnetic Acupressure Balls ( 2 Balls)