1.Different design for different body part, such as knee-joint, articulation cubiti and shoulder joint 2.The spring and far infrared fabric material can be extend freely to meet different size. 3.Heating function max to 55ºC in 10 mins 4.With one powerful motor inside 5. Inside use bamboo charcoal 6. With 4pcs Jade inside 7. Time controll of 5,10,15 mins 8.With 2300MA LITHIUM battery, freely move more than 1.5 hrs.