ZOLL stat-padz II 2-piece electrode pads are specially designed for use with the ZOLL AED Plus or ZOLL AED Pro® defibrillator. Multi-function electrodes with HVP polymer gel and ZOLL guarantees a shelf life of at least 18 months or longer. Please Note: Unlike ZOLL CPR-D padz, Zoll stat-padz II electrode pads do not feature CPR feedback capability (compression depth & pace metronome).