Type A - Only for Shoulder Description 1.Ergonomic for the knee, shoulder and elbow design, can be fixed on any joints.2.Rechargeable lithium-ion battery makes for complete portability, can provide on-the-go relief.3.Selectable heat further releive knee joint, shoulder joint and elbow joint.4.Auto programe for 10-minute, 15-minute, 20-minute.5.Elastic neoprene material and adjustable straps fits different girths of legs or arms and maximizing comfort on skin.Fits girth of 18 inches or less.6.USB