The Philips HeartStart FRx Infant/Child Key allows the FRx AED to convert the existing adult pads into infant/child by decreasing the level of defibrillation therapy. This makes the Philips AEDs simpler to use and more cost-effective over time. There is no need to keep pediatric infant/child pads on hand, or keep up with their expiration date. When the Key is used, the AED adjusts to provide special pad placement and CPR instruction.