Air pressure knee Massager-Dark Blue W607P188750Innovative surround air bag design,through the front,up,left,right,quar tet massage,3 levels of pressure mas sage,suitable for different knee injuryusers. Multi frequency vibration massage torelieve the pain and weakness ofthekneejoint,promote blood circulationand make the knee joint more re laxed. Witha large area of hot compress and2levels temperature adjustable,kneejoint can quickly feel the heat,relieveknee pain and accelerate blood flow. There