Designed for conditions too demanding for many other AEDs. Simple to use. Offers on-demand CPR coaching. Calm, clear voice instructions are precisely timed to the responder's actions, guiding the responder every step of the way. Weighs just 3-1/2 lb. Simplify the rescue of a child with the Infant/Child key. Unique in the industry, the Infant/Child key turns the HeadStart FRx into a pediatric defibrillator, which means just one pad set works for adults, children, and infants to simplify the rescue. Automatically conducts self-tests each day. Philips high-current/low-energy therapy ensures a potent defibrillation dose, while at the same time, minimizing side effects that are harmful to a fragile heart.