These special non-clinical pads, when installed in the HeartStart HS1 Defibrillator, suspend the defibrillator's ability to deliver a shock and activate its training mode, enabling the user to run any of eight emergency scenarios. The defibrillator's voice instructions include cardiopulmonary resuscitation (CPR) coaching. training pads cartridge can also be used on a manikin, with the aid of an Internal Manikin Adapter or an External Manikin Adapter.