Separate and specific algorithms for adults and children are used to analyze a victim's heart rhythm. TheZOLL AED Plus can defibrillate children up to eight years of age, using the Pedi-padz II electrodes. Separate energy levels have also been incorporated for paediatric patients. Electronics in the AED Plus adjust defibrillating energy levels automatically so that suitable doses are delivered accurately, when needed. With ECG analysis designed specifically for a paediatric heart rate, coupled with appropriate defibrillation energy levels, the AED Plus can handle both adult and paediatric rescues.