ZOLL Medical Corporation is a medical device company that develops and manufactures products for emergency medical services, hospitals, and military organizations. The company was founded in 1980 and is based in Chelmsford, Massachusetts. ZOLL's products include defibrillators, cardiac monitors, automated external defibrillators (AEDs), and other medical devices. The company is committed to improving patient outcomes and has received numerous awards and accolades for its innovative products and services.