Enhanced real CPR Help to measure compressions and Guide CPR. Integrated pediatric rescue at the push of a button with child mode. The Zoll AED 3 has RapidShock™ analysis which enables the industry’s shortest rhythm analysis and allows ZOLL AED 3 to deliver a shock, if needed, in as little as 5 seconds. Minimizing pause time allows for more lifesaving CPR, improves CPR quality, and can improve patient outcomes from sudden cardiac arrest. It also utilizes one-step Uni-padz electrodes that work on both adult and child patients, so the untrained bystander can act quickly to help save a life.