easy to change air bags : 24pcs of air bags independent and easy to change(16pcs of air cells for jacket,8pcs of air cells for pants) easy to use ; connectors allow applicator easily swap, just plug in and do the treatment by the 7 inch color touch screen. easy to operation five function modes with eyes massage, air pressure and vibrate,heating, vibrate special noise reduction device keeps the noise less than 50db.the air pumps are from taiwan and air pressure is 20~360mmgh and keep the machine can continouly work well. more soft and smooth, water proof, easy clean, breathable pu material.syi