ZOLL Stat-padz® are the fastest, easiest-to-use multi-function defibrillator electrodes and are optimized for emergency resuscitation situations. Unique ZOLL features save life-saving seconds and maximize efficacy: Preconnect™ saves critical application time. Speed Pack™ reduces cord tangles and fumbling. Anatomically correct diagrams facilitate proper pad placement. Improved polymer gel enhances lateral conductivity; results in less skin effects. Center energy feed distributes energy uniformly; reduces edge effect. Differentiated round front and rectangular back pads are diagrammed to facilitate proper pad placement. For compatibility with AED Plus and AED Pro, chose Stat padz II. Same great features as the Stat-padz, but with a specially designed connector that works directly with the AEDs.