The lightest of all AED's weiging in at just 2.4 pounds, the Heartsine Samaritan AED is easy to operate with verbal and visual instructions to the care giver. It's impressivedesign along with ease of use were just a few of the reasons the FAA's Public Access Defibrillation Program chose the Samaritan defibrillator to be installed in all facilites across the United States.