To facilitate training on the OnSite Defibrillator, Adult (M5073A) and Infant/Child (M5074A) Training Pads Cartridges are available. These special purpose pads, when installed in the HeartStart OnSite, suspend the defibrillator's ability to deliver a shock and activate its training mode, enabling the user to run any of eight emergency scenarios. Depending on which cartridge is used (Adult or Infant/Child), the defibrillator's voice instructions, including cardiopulmonary resuscitation (CPR) coaching, will be appropriate for treating the simulated victim. 

A training pads cartridge can also be used on a manikin, connected with an internal (M5088A) or external (M5089A) manikin adapter.