The Philips OnSite/Home Adult SMART Pads are for patients > 8 years of age and > 55lbs experiencing cardiac arrest. The clear plastic housing has a “PULL” handle built into it for easy access. The housing serves to protect the pads from puncture as well as turning on the AED once the handle is pulled. It also helps to make changing out pads easier than ever before. The pads have a shelf-life of 2 years.