The Physio-Control Lifepak 9 is a microprocessor-based defibrillator, and is available in three models: 9, 9P (pacing), and 9A. These units have a built-in recorder and sealed lead acid battery back-up. Lifepak 9s meet current ACLS standards and allows for 17 energy selections, HR alarms, 5-lead monitoring, recorder and CODE SUMMARY critical event record.