The Defibtech Lifeline ARM Automated Chest Compression Device is a mechanical solution, used as an adjunct, to manually perform cardio pulmonary resuscitation (CPR) when effective compressions are not possible. Automated and portable, the battery- or AC-powered solution provides chest compressions on adult patients who are in sudden cardiac arrest. A compression module, which mounts into a frame paired with a backboard, contains the user interface. The device can be used by medical professionals certified in CPR—such as first responders, paramedics, EMTs, and hospital personnel. When CPR is done manually, fatigue can occur in as little as one to two minutes, jeopardizing effectiveness. The Lifeline ARM ensures that CPR can be performed in compliance with American Heart Association guidelines for compression depth and rate.