An AED unit is operable to selectively switch to a pediatric rescue protocol by inserting a key-like device into an aperture of the AED unit. A sensor inside the case of the AED unit senses the presence of the device in the slot and responds by executing the pediatric rescue protocol. A separate electrode pad mating connector on the AED unit receives an electrode pad connector, the associated electrode pads being suitable for either adult or pediatric patients.
