*This product to adopt micro computer control program combines massage chair function and Yamato chair unique contour design with 360 degree rotary base, backrest kneading mechanism can be adjusted in 5 different sitting angles until desired is the ideal family health care choice; *On back-1 strong anti-interference magnetic vibration motor with a pair of infrared; *On waist-DC 12V of 6 massage balls unit; *On seat -2 strong anti-interference magnetic vibration motors.