The Cardiac Science Powerheart G3 Adult Defibrillation Pads (non-polarised) are designed for use with all Powerheart Automated External Defibrillators excluding the Powerheart G5 AED. The pads are non-polarised, meaning they can be placed in either position on a patient's torso, reducing confusion and pressure in a stressful scenario.This product is not a substitute for direct medical attention from a healthcare practitioner. Always read the label and follow the directions for use.