Philips HeartStart FR-2 Infant-Child PadsThese single use infant child electrode pads are designed for treating sudden cardiac arrest in a child younger than 8 years old and weighing less than 55 lbs. A childs size dictates that the shock energy level delivered to them should be reduced from 150 joules down to 50 joules. Not sure which pads you need? Refer to our AED PAD GUIDE. Compatible with Philips HeartStart FR2+ AEDs (Not compatible with FR or FR1 AEDs)