The Phillips HeartStart Home AED is an award-winning home AED that has been designed to let virtually anyone use it in the event of a sudden cardiac arrest. Clear voice instructions from the unit guide you through each step. The HeartStart AED can even adapt the instructions based on your actions. Using sophisticated technology, this AED can quickly decide whether a shock is necessary and will only deliver a shock if necessary. It will even guide you through the steps of CPR. It performs comprehensive daily self-tests, and requires little to no maintenance.