The Zynex Medical Electrodes TENS 2" Round are high-quality electrical stimulation electrodes designed for medical use in orthopedics. This package includes 10 packs of electrodes and 4 9v battery supplies, making it convenient for healthcare professionals to provide electrotherapy and ultrasound therapy to their patients. The Zynex brand is known for producing reliable medical equipment, and the model 300027 is specifically designed for orthopedic applications. These electrodes are essential for administering electrical muscle stimulation to help alleviate pain and promote healing in the musculoskeletal system.