Zoll Stat-padz® II, HVP (Hight Viscosity Polymer) Multi-function electrodes. Multi-function: defibrillation, non-invasive pacing, cardioversion and ECG monitoring. For use with Zoll AED Plus® and AED Pro® Models. It will also work with the M Series®:, E Series®, R Series® and X Series™ AEDs provided that the customer has a Multi-Function Cable. Please note that there is no CPR feedback (compression depth & pace metronome) capability with this traditional 2-piece electrode.