Danninger Danniflex 480 Knee Continuous Passive Motion (CPM) Machineis the most popular, easiest to use, hospital-to-home unit! It is also marketed under the OrthoRehab brand as the 480E CPM. The 480 Lower Limb CPM device combines lightweight and durable construction with ease of operation. Weighing only 11 kg (24 lbs.), and equipped with a convenient carrying handle, the 480 is suitable for both hospital and home use. Range of motion is adjustable from -5° extension to 120° flexion.