The ERS040 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 AED has a simple two-button user interface, clear, calm voice prompts, brightly lit progress lights, and an actively illuminated status indicator. This AED has a roomy handle and rubberized surfaces.