The HeartSine Samaritan Adult PAD-PAK is designed for use on patients over 8 years old and above 55 lbs. This package contains a battery and one set of adult defibrillation PADs in an "all-in-one" system cartridge, with only one expiration date to monitor. Each unit enables a Samaritan® PAD unit to provide over 6 hours of continuous monitoring or 60 shocks. For patients > 8 years or 55 lb (25 kg). Pad-Pak-01 Non-Latex Shelf Life: 1460 days