Works on massaging the neck, back, shoulders, waist, legs, hips, and the entire body. Designed with a number of balls, clockwise and counterclockwise. Mesh fabric allows ventilation with a large area. Infrared heating with hot pressure effect works on gradually relaxing. Wavy curved design fits the cervical spine, works on relaxing and enjoying. Also fits the waist curve. Suitable for people suffering from sleep problems, fatigue, or lack of exercise, and for those with health issues in the neck and shoulders, and the elderly. Specifications: Power 24 watts Electricity 220-240 volts Frequency 50/60