- Massage human body for Shoulder, Thigh, Waist, Neck, back side, Feet and Hands, etc. - One touch ON/OFF switch. - Vibration speed : 3600 r.p.m - USB power : 4.0 ~ 5.5V (150mA) - Dimension : 85mm x 43mm - Weight : 147g only. - 1.8 meters USB Cable. - Enjoy massage in your car + Car to USB Adapter. * This USB Massage Ball only for massage purpose, not for medical treatment.