The Philips Heartstart FRx AED has advanced life guidance features to aid in a rescue. It is easy to setup and delivers clear and concise voice prompts that walks even the untrained individual through a rescue. It is a Semi-Automatic device; it will state that a shock is needed, and the shock button must be pressed for the shock to be administered. The same electrodes for this device are used for children and adults. All that is required is the purchase of an Infant Key which is inserted into the device to change the mode. Daily, weekly, and monthly self-tests are taken in order to ensure the device is ready for a rescue at all times. It has quick shock capabilities where within 10 seconds of completing CPR the device is ready to administer a shock. The device itself comes with an 8-year warranty. The battery is good for 4 years after installation in the device. This package includes a Rigid Plastic Waterproof Shell Case which provides the most protection from impacts as well as water exposure.