Philips QCPR Meter - used with MRx || Product Usage: || The Philips CPR meter is intended for use with the Philips HeartStart FR3 automated external defibrillators (FR3) with PR2.0 or higher software or on HeartStart MRx devices with software version F.01/R.01 or F.02/R.02 installed. The Q-CPR option provides feedback designed to encourage rescuers to perform resuscitation in accordance with AHA/ERC guidelines for chest compression rate, depth, and duty cycle and ventilation rate, volume and flow rate (inflation time).