Product: Philips HeartStart MRx Monitor/Defibrillators
Units Affected: MRx units meeting one or both of the conditions described in the “How to Identify Affected Products” section of this letter, AND with a serial number within the following ranges:
Model M3535A: US00100100 to US00552845
Model M3536A: US00100902 to US00552848
Model M3536M: US00500002 to US00501201
Model M3536MC: US00500001 to US00500087
Model M3536M4: US00500003, US00500004, US00552673, US00552678, US00552679
Model M3536M5: US00500001 to US00552801