The Chattanooga OptiFlex K-1 Knee CPM Pendant is a hand control that can be attached to the OptiFlex K-1 Knee CPM therapy device. These pendants are available in three configurations: Standard, Comfort, and Classic. This item is used for postoperative treatments of Continuous Passive Motion (CPM). CPM is used to help the joints of recover after surgery, by exercising the joint so that surrounding tissue won't stiffen and scar. To ensure the patient maintains the maximum range of motion post-surgery, the CPM is used during the months of recovery following the operation and the attached pendants can help keep treatments on track.