 Now you can get powerful hospital pain relief right in your home. You can do it with the two new Edenpure Smart Pain Knot Pain Relief Appliances. One appliance relieves pain for your back and the other appliance relieves pain for your joints such as knees, shoulders and elbows. For back pain relief, you just lay in bed and put the appliance under your back. For joint pain relief, you just sit in a chair and strap the appliance to your knee, your shoulder or your elbow.