Philips, the leader in portable defibrillation technology, designed the HeartStart OnSite Defibrillator for the ordinary person in the extraordinary moment. The first commercial defibrillator available without a prescription and so easy to use that you can potentially save the life of a coworker, friend, or anyone else stricken with sudden cardiac arrest. Weighing just 3.3 lbs., this small and lightweight defibrillator can be easily carried to the victim’s side. Using clear, calm voice instructions, the OnSite Defibrillator guides you through each step of defibrillation. And like all HeartStart Defibrillators, it can be used to treat infants and children as well as adults.