The Defibtech LifeLine DCF-100 Automatic External Defibrillator (AED) is a semi-automatic defibrillator that is technologically advanced enough to include all mission critical features necessary to provide the most advanced treatment for Sudden Cardiac Arrest. Yet is so simple and unintimidating to use that even non-medical personnel can effectively save lives. The Lifeline AED has a simple two button user interface, clear, calm voice prompts, brightly lit progress lights and actively illuminated status indicator. The Lifeline AED has a roomy handle and rubberized surfaces.