The HeartStart FRx AED Defibrillator by Phillips is a safe, easy to use AED that is fully portable and always ready. The HeartStart FRx Defibrillator was designed to withstand water, 500 lbs of pressure, and a one-meter drop onto concrete. This AED will guide you through the process of dealing with a person that is experiencing sudden cardiac arrest. With calm, clear voice commands it will tell you exactly what to do. It also features a 5 year factory warranty.