hand massage shoulder and neck massage waist and abdominal massage leg massage. at works its vibration can reach to the deep muscle streamline shape hardness with softness Vibration massage promotes blood circulation relieve muscle ache and improve chronic pain Can relax pressure of muscles Can relax stomachache indigestion insomnia Good for body massage Powered by 3 AAA battery or USB power cable (battery not included) Softly pressed 360-degree rotating heart Rated input voltage:DC4.5V-DC5V Rated dissipation power:2.5W