Operations status indicator for battery and pad life, Free, robust carry case, Daily self-checks, Simple switch from adult to child mode, Two sets of electrode pads, one set pre-connected, one spare set. For use on adults and children (age1+), Clear visual and verbal guidance, Ambient noise adjustment, CPR detection and metronome, Large internal memory with simple data access, Less than 6 seconds from completion of CPR to shock delivery, Disposable battery pack