I am selling this item because I bought it in August but no longer use it. I have only used it two or three times. I think this is a product that you can still use. With this item, you can reset your shoulder blades in just 10 seconds by simply lying down! This is a full-fledged stretching device supervised by a chiropractor. ◆ Replicates the techniques of a chiropractor, gently pressing on your back in a comfortable way that is difficult to loosen on your own by swaying back and forth. ◆ Comfortably stretches with 18 protrusions that thoroughly loosen the shoulder blades and surrounding muscles, and a curved shape that supports the back. ◆ By swaying from side to side, it applies moderate pressure to areas you can't reach, powerfully loosening them. Please understand that this is a used item that has been stored at home and inspected by an amateur, so only those who understand this are welcome to purchase.