The HeartStart OnSite Defibrillator, based on extensive research and user feedback, is a defibrillator so easy to use that with minimal training you can potentially save the life of a co-worker, friend, or anyone else stricken with sudden cardiac arrest. Using clear, natural voice instructions, the OnSite Defibrillator guides you through each step of defibrillation and CPR. Integrated SMART Pads placed on the patients bare skin transmit information to the defibrillator, which senses and adapts to your actions every step of the way.