Four kneading massage heads, This product have a innovative design, simulates the kneading hands of a professional massagist, unique back kneading equipment chain most chair. It can massage whole back by dint of up --- down and automatism circulation move to relieve tension, tiredness, neck vertebra, backbone, and waist ache. It can use orientation kneading massage, let you enjoy easy massage at any moment. This cushion have equipment vibration massage, it can accelerate blood circulation, relieve tiredness