The Zoll AutoPulse Cardiac Support Pump does near perfect chest compressions which help in cardiac arrest situations. The Zoll AutoPulse is battery powered and uses a load-distributing LifeBand to squeeze the entire chest. This allows for more consistent compressions than those delivered by typical manual compressions. Another nice feature is that while the AutoPulse is providing compressions the life-saver can focus on other activities. Genius!