HeartStart MRx etCO2 Calibration Kit is designed for hospital and EMS customers with direct access to biomedical engineering capabilities. The Calibration Kit contains a calibration tube assembly, adult/pediatric filter line set and a calibration regulator. Additional components of each kit contain instructional aids including a Calibration DVD and a printed HeartStart MRx etCO2 Calibration Instruction manual to assist in maintaining the HeartStart MRx defibrillator.