HeartStart Infant/Child SMART Pads Cartridge, HS1Philips HeartStart Onsite Infant Child Cartridge Electrode Pads reduce the energy therapy for younger patients. The Philips HeartStart Onsite Infant Child Electrodes are meant for children eight years or younger, or for those that weigh less than 55 lbs. Philips Heartstart Onsite Infant Child Electrode Pads Cartridge M5072A SMART Pads reduce the defibrillator's shock energy, so that an infant or child suffering sudden cardiac arrest can be treated