This fully automatic AED offers CPR help to assist rescuers in delivering chest compressions at the correct depth and rate for high-quality cardiopulmonary resuscitation. If a shockable heart rhythm is detected, it delivers a shock on its own, eliminating the need for someone to push the shock button. CPR feedback tool sees what you're doing and provides feedback to help you do it well. Audio and visual prompts deliver constructive feedback to help you rescue with confidence and clarity. One-piece electrode pad allows you to make fast and accurate placement.