The ZOLL AED Pro builds on the impressive Plus platform, but adds features needed by trained professionals. The Pro is ideal for monitoring via ECG cable and showing heart rate, shocks delivered, and CPR compression depth. In order to provide quality CPR, the Pro provides feedback to both professionals and lay rescuers with the CPR Help feature. The AED is available as semi-automatic or fully automatic with manual override for ALS professionals. If you’ve used ZOLL devices on an ambulance or in a hospital, you will definitely appreciate the breadth of features and functionality on this device!