1.The intellective manipulators, driven by six wheels mechanism, travels up & down at back, effect massage at neck, shoulder, ba Model No: KBP-B011 Massage SofaInstruction for the product 2.Two air bags at cushion and eight air bags at the calf rest.4.Equipped with swivel wheels, it can be flexibly removed; 6. The massage strength is regulable during massage process, according to your needs.